May 18 (UPI) — President Donald Trump said Monday that he’s called off attacks planned against Iran on Tuesday, claiming that “serious negotiations” are taking place to end the conflict.

He said that the leaders of Qatar, Saudi Arabia and the United Arab Emirates requested that he delay the attacks but that a large-scale assault could take place “on a moment’s notice” is a deal is not reached.

“This Deal will include, importantly, NO NUCLEAR WEAPONS FOR IRAN!” the president wrote in a social media post.

Later Monday, Trump told reporters that this time is “a little bit different” from previous times he said Iran was close to an agreement. He did not say how it is different.

This announcement comes a day after the president renewed his threats of mass violence against Iran, warning Tehran that “the Clock is Ticking” as the stalemate in talks to end the war shows no signs of ending.

In a statement on his Truth Social platform on Sunday night, Trump wrote: “For Iran, the Clock is Ticking, and they better get moving, FAST, or there won’t be anything left of them.”

“TIME IS OF THE ESSENCE!”

The two-sentence statement echoed the scale of violence he threatened April 7, shortly before the cease-fire was announced, when he warned Iran to make an agreement to end the war or “A whole civilization will die tonight, never to be brought back again.”

Trump has been seeking an agreement with Iran to end the war since the conflict was halted April 8 with a cease-fire to permit negotiations.

Those negotiations have progressed little if at all since talks broke down in Islamabad in mid-April.

An Iranian proposal recently sent to the United States was rejected by Trump, who told reporters aboard Air Force One on Friday en route to Washington from China that he looked at it and found the first sentence unacceptable.

“Well, I looked at it, and if I don’t like the first sentence, I just throw it away,” Trump said.

Asked what the first sentence was, Trump replied, “An unacceptable sentence.”

Trump said he is seeking a lengthy suspension of Iran’s nuclear program, stating that two decades may comply with his demands but “it’s got to be a real 20 years.”

According to Iranian state media Press TV, Iran’s proposal calls for a comprehensive end to the war, full compensation from the United States for damages, the removal of sanctions, the release of frozen Iranian assets and recognition of Iran’s sovereignty over the Strait of Hormuz.

Iran’s semi-official Fars news agency reported the United States responded with five demands: no compensation, no unfreezing of assets, the handover of 881.8 pounds of uranium to the United States, only one nuclear facility remaining active and making a halt to the war on all fronts conditional on negotiations.

In response to Trump’s threat on Sunday, Brig. Gen. Abolfazl Shekarchi, senior spokesman for Iran’s Armed Forces, called Trump “delusional,” the Islamic Republic News Agency reported.

“Repeating any foolishness to compensate for America’s disgrace in the third imposed war against Iran will bring no consequence other than receiving more crushing and severe blows for that country,” Shekarchi said.

He warned Trump if the United States resumed its attacks, “the assets and decayed army of that country will face new, offensive, surprising and stormy scenarios.”