President Donald Trump said on Air Force One Sunday that he called off a weekend attack against Iran at the request of Gulf allies, claiming again that a deal is “imminent.”

Trump added that negotiations between the parties are set to commence on Monday.

“I was asked to by Saudi Arabia, UAE and by Qatar and by Iran. We were all set to go just about at this time right now,” Trump said of calling off the strikes. "We're all set to go. But when the allies asked to call it off, you got to sort of say, well, let's see.”

“The deal is imminent, having to do with the Hormuz Strait, and also, the -- ultimately the denuclearization of Iran,” Trump added.

Still, Trump said that the U.S. was “ready to go” whenever it wants to resume strikes.

-ABC News' Nicholas Kerr

Iranian Foreign Minister Abbas Araghchi said negotiations with Oman concerning the Strait of Hormuz are in their “final stages” and are “on the way to being finalized,” according to Iranian state media.

In a social media post, state news agency IRNA reported that Araghchi made the remarks at the start of a government meeting Sunday, where he presented an update on the talks between Iran and Oman.

"Referring to the progress of the talks, he announced that the negotiations are on the way to being finalized and are in their final stages," the post said.

-ABC News' Jamie Dorrington

Iran's state-run IRNA news agency reported late on Saturday that Iranian Foreign Minister Abbas Araghchi held phone calls with senior officials in Pakistan, Turkey and Saudi Arabia to warn against renewed U.S. military action and threatening consequences if strikes resumed.

The calls reportedly took place in the hours before President Donald Trump said he had cancelled plans for U.S. forces to resume attacks in Iran.

"Warning against any adventurous actions by the U.S. military, the Iranian foreign minister emphasized the country's full readiness to safeguard its national sovereignty, territorial integrity and national security," the IRNA readout said.

Araghchi, the report added, said that "any aggression or hostile act by the U.S. and the Israeli regime, or any participation and alignment by regional countries, would be met with a decisive and proportionate response from Iran's armed forces, with those responsible bearing full accountability for all consequences arising from such adventures."

-ABC News' Rashid Haddou

Saudi Arabia's state-run news agency, SPA, reported on Sunday that the country's de facto ruler, Crown Prince Mohammed bin Salman, spoke with President Donald Trump by phone to urge "de-escalation and diplomacy."

Salman, SPA reported, held a call with Trump "to discuss developments in the region and their regional and international implications."

The crown prince -- who is colloquially known as MBS -- "stressed the need to prioritize dialogue to reduce escalation and the importance of making every possible effort to achieve calm that paves the way for diplomatic solutions, preserves the region's security and stability and prevents a wider conflict whose repercussions would affect regional and international security and stability," SPA said.

-ABC News' Rashid Haddou