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The Escalating US-Iran Standoff United States President Donald Trump has claimed a second round of negotiations with Iran will take place in Pakistan on Tuesday as mediators try to revive negotiations before the end of an ongoing yet fragile two-week ceasefire. The announcement on Sunday came alongside a sharp escalation in rhetoric. Trump warned that Iran must agree to a deal "one way or another – the nice way or the hard way" and threatened to target key infrastructure if negotiations fail. He also renewed his threat of striking "bridges and power plants", which experts said could amount to war crimes under international law. Iran, however, has so far denied it will participate in the talks, accusing the US of "armed piracy" after US forces struck and seized an Iran-linked tanker on Sunday, further heightening tensions between the longtime adversaries. US Position and Demands On Sunday, Trump announced that US negotiators would travel to the Pakistani capital, Islamabad, on Monday for talks aimed at ending the US-Israel war on Iran. In a social media post, the president did not say which officials would be sent to the talks. Last weekend's first round of talks, at which Vice President JD Vance led the US delegation, ended without a deal. Trump accused Iran of violating their two-week ceasefire, which is due to expire on Wednesday, by opening fire on Saturday in the Strait of Hormuz. The US president threatened to destroy civilian infrastructure in Iran if it doesn't accept the terms of the deal being offered by the US. "We're offering a very fair and reasonable deal, and I hope they take it because, if they don't, the United States is going to knock out every single power plant, and every single bridge, in Iran," Trump wrote on his Truth Social platform. In a further escalation, Trump said an Iranian-flagged ship called the Touska was "stopped" by US forces in the Gulf of Oman "by blowing a hole in the engine room". He said it was trying to get past the US naval blockade of Iranian ports. US forces boarded the ship and took physical control of the vessel. Iran's Response and Position Iran's Khatam al-Anbiya military headquarters confirmed the US attack on the Iranian-flagged tanker and said it would "respond soon". Then, Iran's Tasnim News Agency reported that Iranian forces had sent drones in the direction of US military ships. Ebrahim Azizi, the head of the Iranian parliament's National Security Committee, told Al Jazeera that Iran's actions during talks with the US are strictly guided by national interests and security. When asked if Tehran intends to participate in the talks in Islamabad, he said, "Iran acts based on national interests." "We see the current negotiations as a continuation of the battlefield, and we see nothing other than the battlefield in this," he said. "If it yields achievements that sustain those of the battlefield, then the negotiation arena is also an opportunity for us … but not if the Americans intend to turn this into a field of excessive demands based on their bullying approach." Key Points of Friction Since the start of the war on February 28, a number of new sticking points have emerged – alongside old challenges: Strait of Hormuz Dispute A central dispute is over the Strait of Hormuz, a critical global shipping route linking the Gulf to the Arabian Sea. One-fifth of the world's oil and liquefied natural gas (LNG) supplies were shipped through the strait before the war began. Iran insists on sovereignty over the waterway, which lies within the territorial waters of Iran and Oman and does not fall into international waters, and stated that only "nonhostile" ships could pass. It has also floated the idea of levying tolls while Washington demands full freedom of navigation. After the war began, Iran in effect closed the strait by forbidding transits, attacking ships and reportedly laying sea mines. Shipping traffic has since dropped by 95 percent. A week ago, the US implemented a blockade of its own. Its Navy has been blocking Iranian ports to pressure Tehran to reopen the vital waterway, adding another obstacle to the talks. According to Rob Geist Pinfold, a lecturer in international security at King's College London, Trump's stance on the strait has shifted during the conflict and remains unclear. "We've had Trump say that he would be open to jointly controlling the Strait of Hormuz with Iran, where both sides collect a toll for shipping," Geist Pinfold noted, calling this "completely different to the demands of the US on paper but also the demands of the US's regional allies like the Gulf states and Israel, … who would regard any deal that entrenches Iranian control of the Strait of Hormuz … as a stab in the back". "This isn't just between the US and Iran. It's about the US having to keep its regional allies on side," Geist Pinfold told Al Jazeera. Nuclear Enrichment Standoff Another core issue is Iran's nuclear programme, particularly its stock of enriched uranium. The US and Israel are pushing for zero uranium enrichment and have accused Iran of working towards building a nuclear weapon while providing no evidence for their claims. Iran has insisted its enrichment effort is for civilian purposes only. It is a signatory to the 1970 Treaty on the Non-Proliferation of Nuclear Weapons (NPT). In 2015, the US was a signatory to the Joint Comprehensive Plan of Action (JCPOA) under then-US President Barack Obama. In that agreement, Iran pledged to limit its uranium enrichment to 3.67 per cent, which is substantially below weapons grade, and to comply with inspections by the International Atomic Energy Agency (IAEA) to insure it wasn't developing nuclear weapons. In return, international sanctions on Iran were lifted. However, in 2018, during his first term, Trump withdrew the US from the JCPOA despite the IAEA saying Iran had complied with the agreement up to that point. In March 2025, Tulsi Gabbard, the US director of national intelligence, testified to Congress that the US "continues to assess that Iran is not building a nuclear weapon". A month later, the IAEA estimated that Iran had 440kg (970lb) of 60-percent enriched uranium. While that is also below weapons grade, it is a short jump to achieve the 90-percent purity needed for atomic weapons production. On Sunday, in strongly worded comments, Iranian President Masoud Pezeshkian said Trump had no justification to ⁠⁠"deprive" Iran of its nuclear ⁠⁠rights. Maryam Jamshidi, a law professor at the University of Colorado in Boulder, said Iran's position on enrichment is based on Article IV of the NPT, "which recognises that all state parties [to the treaty] have the inalienable right to research, develop and use nuclear energy for peaceful purposes". "In demanding that Iran have no enrichment, the United States is denying Iran its rights under this treaty," she told Al Jazeera. "In insisting that its right to enrichment be preserved, Iran is expressing a reasonable desire to be treated the same as any other state under international law." Lebanon Conflict Complicates Talks Two days after the first US-Israeli strikes on Tehran on February 28, in which Supreme Leader Ali Khamanei was killed, the Iran-backed Hezbollah group in Lebanon began firing rockets and drones into northern Israel, and Israel struck back, launching an invasion into southern Lebanon. Iran is adamant that its ceasefire with the US extends to Lebanon and is demanding Israel end its offensive against its ally Hezbollah and its invasion of Lebanon. After initially denying the two-week ceasefire included Lebanon, Israel accepted a 10-day truce starting on Thursday night after direct Israel-Lebanon talks. However, that ceasefire is also teetering on collapse amid renewed hostilities. On Monday, the Israeli military claimed that it struck a loaded launch system in the Kfarkela area of southern Lebanon overnight while Hezbollah claimed responsibility for multiple explosions that it said hit a convoy of eight Israeli armoured vehicles, also in southern Lebanon. Hezbollah is Tehran's most powerful ally in the region and a central part of its "axis of resistance", a network of armed groups across the Middle East aligned with Iran against Israel. The network also includes Yemen's Houthis and a collection of armed groups in Iraq. Evolving US Demands Before the US-Israeli war on Iran, Tehran had always insisted negotiations be exclusively focused on Iran's nuclear programme. US demands, however, have extended beyond the nuclear file. Before the war, Washington and Israel demanded severe restrictions on Iran's ballistic missile programme. Iran has said its ability to maintain its missile capabilities is non-negotiable. On February 25, US Secretary of State Marco Rubio warned that Iran's refusal to discuss its missile programme was a "big problem". Yet, since the two-week ceasefire was announced on April 8 and the Pakistan-brokered negotiations began, the US has not made any mention of Iran's ballistic missiles, which have been a major feature in Iran's retaliation against US and Israeli forces. Regime Change and Proxy Support The US and Israel have also made no secret of their desire for a change in Iran's government. Asked two weeks before the war began if he wished for a toppling of the government in Tehran, Trump said: "Seems like that would be the best thing that could happen." After the killing of Khamenei and multiple other senior Iranian leaders, Trump claimed the US-Israel war had in effect brought about "regime change", claiming key leadership layers were "decimated". Experts, however, disputed Trump's assertions, saying the government was very much intact, if not stronger. Salar Mohandesi, a professor at Bowdoin College in Maine, argued that despite US claims, what is happening in Iran does not meet any serious definition of "regime change". "The fundamental structures of the Islamic Republic are intact, and the new leaders are regime loyalists who are arguably more hardline than their assassinated predecessors," he told Al Jazeera. Mohandesi said the war has arguably strengthened the Islamic Revolutionary Guard Corps (IRGC), something that is an "acceleration of an existing" trend and does not necessarily amount to regime change, "certainly not in the way Trump means it". "Trump's declaration that he has succeeded in 'regime change' is just a rhetorical move to try to claim victory where none exists," he added. Proxy Group Support Three days before the war began during his State of the Union address to the US Congress, Trump accused Iran and "its murderous proxies" of spreading "nothing but terrorism and death and hate". The US and Israel have long demanded Iran stop supporting its nonstate allies – primarily Hezbollah in Lebanon, the Houthis in Yemen and a number of groups in Iraq. Tehran to date has refused to enter into any dialogue about limiting its support for these armed groups. But on Friday, Trump claimed Iran had agreed to almost all of the US demands, including support for its proxies. A statement by Iran's Ministry of Foreign Affairs rejected that any such agreement was in place, saying: "The Americans talk excessively and create noise around the situation. Do not be misled!" Prospects for a Breakthrough On Sunday, Iran's top negotiator and speaker of its parliament, Mohammad Bagher Ghalibaf, acknowledged that while "conclusions" had been reached on some issues, "we are far from a final agreement." Analyst Geist Pinfold told Al Jazeera that deep divisions between the US and Iran make a comprehensive deal unlikely in the near term despite some openings created by Trump's shifting positions. "The primary complication that would mean a deal is less likely but also one of the potential curveballs that would make a deal more likely is the Trump administration's equivocations regarding what its red lines actually are," he said. "At the moment, the gaps look insurmountable," Geist Pinfold added, noting that "the best-case scenario would be the extension of the ceasefire rather than the actual deal." The US-Iran talks face major structural obstacles despite growing speculation about a negotiated end to the current crisis, according to Bowdoin College's Mohandesi. "Donald Trump feels that he needs to somehow convert this disastrous defeat into some sort of win," he noted, adding: "It's unclear what that would look like at the negotiating table." On the Iranian side, Mohandesi sees little room for compromise on the core strategic issues. "Iran will absolutely not abandon its missile programme. It will not stop supporting its allies in the region, and it will almost certainly not agree to zero enrichment," he said. The academic questioned whether even a restoration of maritime traffic would constitute meaningful success for Washington. Even if Trump "were to somehow convince Iran to return the Strait of Hormuz to the pre-war status quo, it's unclear how that would be a major win since the strait was open before he started the war", Mohandesi said.

The United States is pushing for de-escalation in the region, with President Donald Trump announcing that Israeli and Lebanese leaders will speak for the first time in 34 years. This development has raised cautious hopes for a diplomatic solution to the fighting that has continued for more than six weeks.The conflict has resulted in over 2,000 people killed and more than 1 million displaced across Lebanon. Israel's military operations in Lebanon and its invasion of the country's south have intensified, with Hezbollah entering the war by launching rockets, missiles, and drones towards a missile defense site near Haifa in northern Israel.Iran's speaker of parliament, Mohammad Bagher Ghalibaf, told his Lebanese counterpart, Nabih Berri, in a phone conversation that a ceasefire in Lebanon is vital. Ghalibaf led the Iranian delegation at the first round of US-Iran talks in Pakistan last week, which ended without a deal.The prospective talks between Israel and Lebanon follow a rare direct engagement between the two countries' US ambassadors in Washington on Tuesday – also their first such direct contact in decades. However, with both sides maintaining starkly different objectives, and the Lebanon front closely tied to broader negotiations involving Iran, it remains unclear whether the talks can produce tangible results.Analysts say that even if a phone call were to take place between Israel's Netanyahu and his Lebanese counterpart, it would be “mostly symbolic rather than substantive”. Lebanon wants a ceasefire as a priority to enter into negotiations whose aim would be to liberate lands currently occupied by Israel.A key demand from Iran in its dialogue with the US is that Israel end its offensive against Hezbollah in Lebanon. Hezbollah is Tehran's most powerful regional ally and a central part of the “axis of resistance”, a network of armed groups across the Middle East aligned with Iran against Israel.

The frozen assets of Iran, estimated to be over $100bn, have emerged as a significant obstacle in the ongoing talks between the United States and Iran. These assets, which include revenues from oil sales frozen in foreign banks, are a vital component of Iran's economy, which has been severely impacted by sanctions imposed by the US and other nations.The sanctions, in place since 1979, have restricted Tehran's ability to access its own assets, exacerbating the country's economic woes. Mohammad Bagher Ghalibaf, the speaker of Iran's parliament, has emphasized that the release of these frozen assets is a prerequisite for any negotiations.The exact amount of frozen assets is unclear, but experts estimate it to be around $100bn, a sum that is approximately four times what Iran earns annually from hydrocarbon sales. Frederic Schneider, a nonresident senior fellow at the Middle East Council on Global Affairs, noted that this is a substantial amount, especially for a country that has been suffering under decades of US-led sanctions.The frozen assets are held in multiple countries, including Japan, Iraq, China, India, Luxembourg, and Qatar. Iran's economy is in crisis, with decades of sanctions limiting its oil exports and stalling its ability to attract investments and modernize its industry and technology. The release of these assets could provide a significant boost to Iran's economy, allowing it to address its infrastructure needs and stabilize its currency.Roxane Farmanfarmaian, academic director and lecturer in international politics at the University of Cambridge, emphasized that unfreezing Iran's assets would be significant, enabling the country to repatriate its funds earned in hard currency from oil sales and gain control over its currency fluctuations.

A high-level Pakistani delegation, led by Army Chief Asim Munir, has arrived in Tehran to facilitate fresh negotiations between Iran and the United States, with a fragile truce set to expire on April 22.The talks aim to address key issues, including Iran's nuclear program, control of the Strait of Hormuz, and compensation for wartime damages. Pakistani Interior Minister Mohsin Naqvi is also joining mediation efforts in Tehran.US President Donald Trump has expressed optimism about a potential deal, stating that the world should brace for an “amazing two days” as the war with Iran is close to over. The White House has also indicated that additional talks with Iran would likely go forward in Islamabad.Despite these developments, US military maintains its naval blockade on all Iranian ports, which Iran's military has slammed as a violation of the ceasefire. Iran has threatened to retaliate by blocking trade through the Red Sea, Gulf, and Sea of Oman if the US does not lift its blockade.Mediators are pushing for a compromise on three main sticking points – Iran's nuclear program, control of the Strait of Hormuz, and compensation for wartime damages. Sources indicate that Pakistani mediators are optimistic about a potential major breakthrough on the nuclear front.

Pakistani Prime Minister Shehbaz Sharif is embarking on a diplomatic mission to Saudi Arabia and Turkey this week, as his efforts to facilitate a second round of peace talks between the United States and Iran appear to be gaining traction.Sharif's bid to moderate talks comes during a fragile two-week ceasefire that has halted US and Israeli strikes on Iran. President Asif Ali Zardari has urged Sharif and other officials to remain engaged with the US, Iran, and other key powers to sustain the peace process.Reports of backchannel negotiations to arrange new peace talks surfaced on Monday, followed by comments from US President Donald Trump and the United Nations on Tuesday, suggesting there is support for Sharif's push. Trump indicated that talks could resume in Pakistan over the next two days, praising Pakistan's army chief Asim Munir as 'doing a great job.'The Associated Press reported on Tuesday that a diplomat from one of the mediating countries said Tehran and Washington had agreed to more talks, although the location, timing, and composition of the delegations had not been decided. Islamabad and Geneva are being considered as potential host cities.UN Secretary-General Antonio Guterres, who met with the deputy prime minister of Pakistan on Tuesday, said it was 'highly probable' that ceasefire talks would restart. He emphasized the need for continued negotiations and a persistent ceasefire.Any return to the negotiating table would likely test the diplomatic skills of Sharif and other mediators. During the fragile two-week ceasefire, the US military has mounted a naval blockade of Iran's ports and coastal areas in response to Iran's throttling of the Strait of Hormuz, which has caused global oil prices to skyrocket.

The US military's Central Command (CENTCOM) reported that no ships 'made it past' the blockade in the Strait of Hormuz during its first 24 hours. Six merchant ships were ordered to turn around after being intercepted. The blockade, which began after failed US-Iran talks in Pakistan, applies only to vessels entering and exiting Iranian ports, while others remain free to transit the waterway.CENTCOM stated that 10,000 US sailors, Marines, and airmen are involved in the operation, along with more than a dozen US warships and dozens of aircraft. The blockade's effectiveness has raised concerns about Iranian retaliation and its impact on global oil markets.Despite CENTCOM's report, there are conflicting accounts of ships transiting the strait. Reuters reported at least three vessels, including two US-sanctioned tankers, passed through without heading to Iranian ports. However, AFP and US media outlets reported two ships left Iranian ports and transited the waterway.The situation remains tense, with Iran condemning the blockade as 'piracy' and Trump threatening to 'eliminate' any Iranian ships that attempt to break the blockade. Both sides have signaled openness to further talks, with Trump suggesting potential developments within two days and Iran expressing willingness to negotiate on issues like the Strait of Hormuz, Iran's nuclear program, and a ceasefire extension to Lebanon.

Pakistan's Prime Minister Shehbaz Sharif recently engaged in high-stakes diplomacy, hosting United States Vice President JD Vance for talks on the sidelines of direct negotiations between Washington and Tehran, marking the highest-level engagement between the two nations since the 1979 Iranian Revolution. Simultaneously, Saudi Arabia's Ministry of Defense announced the arrival of a Pakistani military force at King Abdulaziz Air Base in the kingdom's Eastern Province, under the Strategic Mutual Defence Agreement (SMDA) signed last year. The SMDA commits both countries to treating any act of aggression against one as an act against both, strengthening joint military coordination and raising operational readiness. This development has underscored Pakistan's delicate balancing act in the midst of a war that has destabilized the global economy and led to attacks and deaths in multiple countries. Pakistan has been a central mediator between the US and Iran, hosting their teams and driving attempts to continue talks after a breakdown in negotiations. However, its commitment to militarily assist Saudi Arabia, a key ally repeatedly hit by Iran, poses significant challenges. Analysts suggest that Pakistan's approach carries both logic and risk, as it attempts to sustain both roles using its commitments under the SMDA to create leverage over Iran and deter further strikes on Saudi installations. The continuation of US-Iran talks is crucial for Pakistan, as hostilities restarting could collapse its strategy and force deeper involvement in the conflict. Experts emphasize that Pakistan's window for playing both mediator and Saudi military ally is narrow, and its military deployment must remain strictly defensive, time-bound, and transparently limited to avoid jeopardizing its relationships with both Iran and Saudi Arabia.

Asian stock markets experienced a significant surge on Tuesday, while oil prices declined, as renewed hopes for ceasefire talks between the United States and Iran brought relief to global markets. US President Donald Trump announced that Iranian officials had reached out to his administration, expressing their openness to a deal.The positive turn for markets came after Trump's remarks at the White House, where he stated, 'We've been called by the other side, and they would like to make a deal very badly.' This development led to gains in major Asian markets, including Japan's Nikkei 225, which rose as much as 2.5 percent, and South Korea's KOSPI, which gained about 3.7 percent. Singapore's Straits Times Index also climbed about 0.6 percent, while Hong Kong's Hang Seng Index was up about 0.4 percent in the early afternoon, and the SSE Composite Index in Shanghai was about 0.5 percent higher.The rally in Asia followed gains on Wall Street, with the benchmark S&P; 500 finishing up 1 percent overnight. Meanwhile, Brent crude, the benchmark for global oil prices, dipped nearly 1.5 percent, falling below $98 a barrel. This decline in oil prices occurred despite the US imposing a naval blockade on Iranian ports, a move that analysts warn could exacerbate the energy shortage affecting the global economy.Iran has effectively halted shipping through the Strait of Hormuz since the start of the conflict on February 28, significantly impacting the global energy market. Only 21 vessels transited the strait on Sunday, compared to roughly 130 daily transits before the conflict began, according to maritime intelligence provider Windward.

High-level talks between the United States and Iran ended without an agreement in Islamabad, Pakistan, on Sunday. The breakdown leaves a fragile two-week ceasefire as the only barrier between diplomacy and a return to war. Pakistan, which played a key role in bringing both sides to the negotiating table, remains committed to facilitating further dialogue.The talks, the highest-level direct engagement between Washington and Tehran since the 1979 Islamic Revolution, stalled over differences surrounding Iran's nuclear program. The US insisted on a commitment from Iran that it would not seek a nuclear weapon, while Iran's Foreign Minister, Abbas Araghchi, accused the US of 'maximalism' and shifting demands.Despite the setback, Pakistan's Deputy Prime Minister and Foreign Minister, Ishaq Dar, emphasized that Pakistan will continue to play a role in facilitating engagements and dialogue between the two nations. Iranian officials, including Parliament Speaker Mohammad Bagher Ghalibaf, also expressed optimism about the potential for future talks.The immediate threat to the ceasefire comes from the evolving situation in the Strait of Hormuz and Lebanon. Iran has warned that continued Israeli strikes on Lebanon could render negotiations meaningless, while the US has announced a blockade in the Strait of Hormuz, which Iran controls and uses as a key negotiating lever.Analysts say Pakistan's role is crucial in preventing a prolonged conflict, but its economic fragility and limited leverage constrain its ability to impose outcomes. Pakistan's Prime Minister, Shehbaz Sharif, and Chief of Army Staff, Field Marshal Asim Munir, have been praised by both Trump and Iranian officials for their efforts to secure the ceasefire and host the talks in Islamabad.