Washington, April 13 -- President Donald Trump on Sunday ordered a US naval blockade of the Strait of Hormuz in response to Iran's "unyielding" refusal to give up its nuclear ambitions during peace talks in Islamabad, AFP reported. While acknowledging that the marathon negotiations in Pakistan had gone "well" and "most points were agreed to," Trump said Tehran had refused to concede on the issue of its nuclear program. "Effective immediately, the United States Navy, the Finest in the World, will begin the process of BLOCKADING any and all Ships trying to enter, or leave, the Strait of Hormuz," Trump said on his Truth Social platform. "Any Iranian who fires at us, or at peaceful vessels, will be BLOWN TO HELL!" In two lengthy posts on Truth Social, Trump slammed Iran for promising to open the Strait of Hormuz, a strategic waterway through which a fifth of the world's crude oil passes, and "knowingly" failing to deliver. "They say they put mines in the water, even though all of their Navy, and most of their 'mine droppers,' have been completely blown up. They may have done so, but what ship owner would want to take the chance?" Trump said. He added that he has "instructed our Navy to seek and interdict every vessel in International Waters that has paid a toll to Iran. No one who pays an illegal toll will have safe passage on the high seas", AP reported. Trump also said the US was ready to "finish up" Iran at the "appropriate moment," stressing that Tehran's nuclear ambitions were at the core of the failure to end the war. Iran had effectively blocked the Strait of Hormuz for weeks, since the United States and Israel launched a bombing campaign against the Islamic republic more than six weeks ago. Trump sought to exert strategic control over the waterway responsible for the transportation of 20% of global oil supplies before the war, hoping to take away Iran's key source of economic leverage in the fighting. During the talks, the US military said two destroyers transited the critical waterway ahead of mine-clearing work, a first since the war began. Iran's state media, however, reported the country's joint military command denied that. "We're sweeping the strait. Whether we make a deal or not makes no difference to me," Trump said as talks extended into early Sunday morning. The United States and Iran entered talks with sharply different proposals and contrasting assumptions about their leverage to end the war. Before negotiations began, the ceasefire was already threatened by deep disagreements and Israel's continued attacks against the Iranian-backed Hezbollah in Lebanon. Iran's 10-point proposal ahead of the talks called for a guaranteed end to the war and sought control over the Strait of Hormuz. It included ending fighting against Iran's "regional allies," explicitly calling for a halt to Israeli strikes on Hezbollah. Pakistani officials told AP in March that the US 15-point proposal to Iran included monitoring mechanisms and a rollback of Iran's nuclear programme. Speaking on condition of anonymity as they weren't authorised to discuss details, they said it also covered reopening the Strait of Hormuz. Indeed, Iran's closure of the strait has proved its biggest strategic advantage in the war....