Washington. US President Donald Trump said Tuesday he is extending the ceasefire with Iran at Pakistan’s request while awaiting a “unified proposal” from Tehran, even as the US military maintains its blockade of Iranian ports. 

The move comes as the White House put on hold Vice President JD Vance’s planned trip to Pakistan for a second round of truce talks with Iran, which has balked at further discussions. But Trump warned that the US military will continue its blockade of Iranian ports.

Trump made the announcement as ceasefire talks looked increasingly uncertain, with a two-week truce set to expire on Wednesday. Both countries had said they were prepared to resume fighting if no deal is reached.

Trump said he would "extend the ceasefire until such time as their proposal is submitted, and discussions are concluded, one way or the other.”

Iran has yet to decide whether to join the negotiations in Pakistan, a Foreign Ministry spokesperson said earlier Tuesday, and will only take part if Tehran believes the discussions would yield results.

Trump offered a combative social media post Tuesday night after indefinitely extending a ceasefire in the Iran war, and talks in Islamabad failed to materialize.

Writing on his Truth Social website, Trump contended that “Iran doesn’t want the Strait of Hormuz closed, they want it open” so they can sell their crude oil.

Trump said if he allowed that to happen, there “can never be a deal with Iran, unless we blow up the rest of their country, their leaders included!”

It’s unclear what the next step forward is to resume talks in Pakistan’s capital.

UN Secretary-General António Guterres said the US announcement that it is extending the ceasefire will create “critical space for diplomacy and confidence-building between Iran and the United States,” according to his spokesperson.

“We encourage all parties to build on this momentum, refrain from actions that could undermine the cease-fire, and engage constructively in negotiations to reach a sustainable and lasting resolution,” UN spokesperson Stephane Dujarric said late Tuesday.

The secretary-general “fully supports” Pakistan’s efforts to facilitate US-Iran talks and hopes its efforts “will contribute to creating conditions conducive to a comprehensive and durable resolution to the conflict,” Dujarric said.