US President Donald Trump on Saturday claimed that 1,000 missiles were "locked and loaded" and aimed at Iran, warning Tehran that any attempt to assassinate him would trigger an overwhelming military response. In a post on Truth Social, Trump said the United States had already issued military orders and was prepared to carry out sustained strikes against Iran if its government acted on what he described as threats against his life.Also read: Iran gives US a 'reality check', says Washington broke ceasefire terms "1000 Missiles are Locked and Loaded and aimed at the Islamic Republic of Iran, with thousands of more to immediately follow, should the Iranian Government act on its threat... to assassinate, or attempt to assassinate, the sitting President of the United States of America, in this case, ME!" Trump wrote.He further claimed that the US military was "ready, willing, and able, for a one year period of time, subject to extension, to completely decimate and destroy all areas of Iran."Iran's 'reality check' to USIran meanwhile accused the United States of violating the terms of their ceasefire understanding, with Foreign Minister Abbas Araghchi insisting that Tehran had honoured its commitments despite Trump's declaration that the truce was over.In a post on X, Araghchi said Iran had complied with the ceasefire while accusing Washington of breaching Paragraph 9 of the memorandum of understanding (MoU), which he said barred the United States from deploying additional forces in the region."Iran has so far kept its word, unlike the so-called US Treasury Secretary who is violating Para 9 of the MoU," Araghchi wrote.He did not provide details of the alleged US violation beyond referring to the provision of the agreement.Iranian parliamentary speaker and senior negotiator Mohammad Baqer Qalibaf also warned that Tehran was prepared for an "all-out defence" if Washington failed to honour the memorandum reached last month.Also read: Trump says he left orders to 'bomb Iran at levels they've never seen before' if Tehran kills himTrump declares truce over as diplomacy continuesTrump's latest warning came a day after he declared that the ceasefire with Iran was "OVER", despite saying Tehran had sought further negotiations and Washington had agreed to continue talks.The latest flare-up follows attacks on commercial tankers from Qatar and Saudi Arabia earlier this week, which prompted US strikes on Iranian targets. Tehran retaliated by launching attacks on US military facilities in Gulf states. No fresh attacks were reported on Friday, raising hopes that diplomatic efforts could avert another escalation.Regional diplomacy has nevertheless continued. Qatari officials have held talks with Iranian counterparts to ease tensions and address navigation through the Strait of Hormuz, while Araghchi is expected to visit Oman for discussions on bilateral ties and regional developments.The United Nations has urged both sides to pursue diplomacy. At the UN Security Council, US Deputy Ambassador Tammy Bruce reiterated that Washington still viewed negotiations as the preferred path to addressing concerns over Iran's nuclear programme, while Iran has continued to maintain that its nuclear activities are peaceful.