WASHINGTON, May 11 (Xinhua) -- U.S. President Donald Trump said Monday that the weeks-long ceasefire with Iran remains in effect but is on "massive life support," signaling that Washington will continue pursuing diplomacy with Tehran despite rejecting Iran's latest proposal.

"I would say the ceasefire is on massive life support," Trump told reporters at the White House, describing the current truce as "unbelievably weak."

Trump again slammed Iran's latest response to the White House peace plan, which he rejected one day earlier, calling it "totally unacceptable," stressing that any peace deal between Washington and Tehran would require Iran to pledge to stop pursuing a nuclear program.

He accused Iran of reneging on an agreement to give up its enriched uranium and allow the United States to remove it. "They did two days ago," Trump told reporters. "But they changed their mind, because they didn't put it in the paper."

"They told me, number one, you're getting it, but you're going to have to take it out," Trump said of Iran's uranium buried under rubble following U.S. strikes on Iranian nuclear facilities in June 2025. "The site was so obliterated that there's only one or two countries in the world that could get it."

Iran has not publicly agreed to give up its enriched uranium, insisting that its nuclear program is peaceful.

Also on Monday, Trump said that he is considering restarting Project Freedom, a U.S. military operation aimed at guiding commercial vessels out of the Strait of Hormuz, with an expanded scope.

However, no final decision on whether to restart the project has been made, Trump told Fox News.

Both U.S. and Iranian forces have fired shots at each other in the Strait of Hormuz since the ceasefire took effect earlier last month.