President Donald Trump announced Monday that he was postponing a military strike on Iran that had been planned for Tuesday, saying he made the decision at the request of Middle Eastern allies including leaders from Qatar, Saudi Arabia and the United Arab Emirates.

In a social media post, Trump said he had instructed the U.S. military "to be prepared to go forward with a full, large scale assault of Iran, on a moment's notice, in the event that an acceptable Deal is not reached." The president indicated that "serious negotiations" were currently underway with Iran.

Trump had not previously disclosed the Tuesday strike plan, but had been issuing escalating warnings to Iran over the weekend. The president wrote that "For Iran, the Clock is Ticking, and they better get moving, FAST, or there won't be anything left of them." Trump has repeatedly set deadlines for Tehran regarding potential deals, only to extend them or back away from military action.

The announcement comes amid a fragile ceasefire that was established in mid-April. Trump has been threatening for weeks that the ceasefire could end if Iran does not agree to strike a deal, though the specific parameters for such an agreement have shifted over time.

Separately, the Trump administration announced it was extending sanctions waivers that allow certain purchases of Russian oil despite sanctions on Moscow. Treasury Secretary Scott Bessent said the policy is intended to help nations most vulnerable to high energy prices, as the ongoing conflict with Iran has led to increased oil and gas prices globally.

Trump has been in contact with multiple world leaders about the Iran situation in recent days, including Israeli Prime Minister Benjamin Netanyahu and Chinese President Xi Jinping, as the administration seeks to navigate the complex diplomatic and military challenges in the region.