US-Iran Peace Talks Collapse in Islamabad; Trump Orders Immediate Naval Blockade

US-Iran peace talks in Islamabad collapsed on April 12, 2026, with no agreement reached, prompting President Donald Trump to order an immediate naval blockade of the Strait of Hormuz and to threaten military action against Iranian forces and mines in the waterway. Vice President JD Vance announced the failure of the talks from Islamabad before departing Pakistan, stating that the United States had not reached an agreement with Iran and that Tehran had made no promise to definitively abandon its nuclear weapons program. Trump, posting on Truth Social, said the meeting "went well, most points were agreed," but acknowledged the two sides had failed to bridge their differences on Iran's nuclear program. The breakdown triggered an immediate and sharp escalation, with both Washington and Tehran issuing military warnings within hours of the announcement.

Trump orders blockade, threatens to blow up Iranian mines Trump announced that the U.S. Navy would "immediately" begin blockading all ships attempting to enter or leave the Strait of Hormuz, and instructed the Navy to identify and interdict every vessel in international waters that had paid a transit toll to Iran. Trump described Iran's toll system as an "illegal toll" and called it "worldwide extortion," adding that "leaders of nations — particularly those of the United States — will never let themselves be extorted." He also stated that the United States would begin destroying mines that Iran had laid in the strait, and warned that any Iranian forces firing on U.S. or peaceful vessels would be "blown up." Trump added on Truth Social that other countries would be involved in the naval blockade, without specifying which nations. He framed the blockade as a response to Iran's obstruction of free maritime passage, writing that "at some point we will reach a condition where everyone is allowed in and everyone is allowed out," but that Iran had prevented this outcome.

Iran's Revolutionary Guards warn of 'deadly vortex' in the strait The Pasdaran's naval command responded by declaring that all maritime traffic in the Strait of Hormuz was "under the full control of the armed forces," and warned that any enemy making a miscalculation would "remain trapped in a deadly vortex in the Strait." The Guards published a video on X showing ships in crosshairs alongside their statement. Iranian state media, as reported by the Wall Street Journal, also announced that Iran had deployed Navy special forces along its southern coast, with images released by the Student News Network showing soldiers in camouflage near a sandy coastline, described as a measure to "counter any possible enemy infiltration into the country's territory." The deployment followed weeks of Iranian preparations that reportedly included strengthening air defenses, positioning mines, and constructing bunkers on islands along the Iranian coast. Washington had previously ordered thousands of Marines and paratroopers to the Middle East, deployments that Iranian officials cited as the trigger for their own defensive measures. Iran denied the presence of two American warships reported to be in the strait.

Tehran blames US demands, Pakistan urges ceasefire respect Iran's Foreign Ministry spokesperson Esmaeil Baghaei Hamaneh told Iranian state television that the failure of the talks was the result of "unreasonable demands" from the United States, while simultaneously downplaying the collapse as expected. „It was evident from the beginning that we should not have expected to reach an agreement in a single session. No one expected it.” — Esmaeil Baghaei Hamaneh via ANSA Baghaei Hamaneh said he was "certain" that contacts with Pakistan and other regional partners would continue. Pakistan's Foreign Minister Ishaq Dar, whose government hosted the talks and served as mediator, called on both sides to honor their existing ceasefire commitments regardless of the negotiating failure. „It is imperative that the parties continue to respect their commitment to the ceasefire.” — Ishaq Dar via ANSA Dar stated that Pakistan "has played and will continue to play its role to facilitate engagement and dialogue" between Iran and the United States. The main obstacles to a deal were reported to include the status of the Strait of Hormuz, Lebanon, Iran's nuclear program, sanctions, frozen assets, and war reparations.

The US-Israel military campaign against Iran, known as Operation Epic Fury, began on February 28, 2026, with strikes that killed Supreme Leader Ali Khamenei. His son Mojtaba Khamenei was appointed Supreme Leader on March 9, 2026. A two-week ceasefire between the United States and Iran was declared following the initial phase of hostilities, during which the Islamabad talks were convened in an attempt to negotiate a broader settlement. The Strait of Hormuz is a critical global chokepoint through which a significant share of the world's seaborne oil and gas passes, making any disruption to navigation there a matter of acute concern for energy markets and regional stability.