WASHINGTON, April 21 (Xinhua) -- U.S. President Donald Trump said Tuesday he will extend the ceasefire with Iran as the current two-week truce is set to expire on Wednesday night.

"Based on the fact that the Government of Iran is seriously fractured, not unexpectedly so and, upon the request of Field Marshal Asim Munir, and Prime Minister Shehbaz Sharif, of Pakistan, we have been asked to hold our Attack on the Country of Iran until such time as their leaders and representatives can come up with a unified proposal," Trump wrote on Truth Social.

The U.S. president said he will "extend the ceasefire until such time as their proposal is submitted, and discussions are concluded, one way or the other."

The U.S. military will continue the blockade against Iran and "remain ready and able," Trump said.

Trump said on Monday that it was "highly unlikely" for him to extend the truce, and on Tuesday morning he told U.S. media that he doesn't want to do that, expecting the United States to "end up with a great deal" with Iran while threatening to bomb Iran again if no deal is reached.

U.S. Vice President JD Vance, whose trip to Pakistan for talks with Iran has been put on hold, was at the White House for meetings on Tuesday, along with Trump's envoy Steve Witkoff and son-in-law Jared Kushner, multiple media outlets reported.

U.S. Secretary of State Marco Rubio and Secretary of Defense Pete Hegseth arrived at the White House on Tuesday afternoon to join discussions over Washington's next steps, according to the reports.

The United States violated the ceasefire by starting a naval blockade of Iran's ports, Iranian Foreign Minister Abbas Araghchi said Tuesday on X.

Iran's Foreign Ministry spokesman Esmail Baghaei told state TV late Tuesday that Iran has not yet decided whether to join fresh peace talks since it was upset about what he called mixed messages from Washington.

"It is not out of indecisiveness, it is because we are facing contradictory messages and behaviors, and unacceptable actions from the American counterpart," Beghaei said.

As U.S. forces have intercepted and taken custody of an Iranian-flagged cargo ship on Sunday and Iran has not yet announced its decision to send a negotiating team for talks, the prospect of an expected second round of U.S.-Iran talks remains unclear, according to media reports.