Aug. 2 (UPI) — President Donald Trump said Sunday night that negotiations with Iran toward ending the war will resume Monday, about a month after formal talks between the two unraveled and preceded a return to open conflict.

Speaking to reporters aboard Air Force One en route to Washington after spending a weekend at his Bedminster, N.J., golf club, Trump said talks with Iran will begin Monday afternoon, claiming, as he has repeatedly throughout the war, that Iran wants “to make a deal.”

“We’ll see if it’s true,” he said. “I’d love to do that. Save a lot of lives. Save a lot of unnecessary power, to be honest with you.”

Trump had called off what he advertised as a massive attack on Iran over the weekend, stating it was at the request of allies and Tehran, which he said had agreed to “the parameters of a deal.”

Aboard his plane, he identified Saudi Arabia, the United Arab Emirates and Qatar as the nations that had asked him to hold off.

“It would have been a massive attack. We were all set to go. But when the allies ask to call it off, you go to sort of say, ‘well, let’s see,'” he said. “And the reason they asked they think there’s a deal.”

Trump has long sought a deal with Iran to constrain its nuclear program, going back to his first administration when in 2018 he unilaterally pulled the United States from an Obama-era multinational accord in order to fashion a new one, and imposed sanctions on Tehran to force it to the negotiating table.

In late February, the United States and Israel attacked Iran with the aims of destroying its remaining nuclear capabilities and inciting regime change, instead igniting the five-month-long war, during which Tehran has laid military claims to the vital Strait of Hormuz.

An April cease-fire created conditions for a memorandum of understanding to be signed in mid-June that was to lay the foundation for ending the war. Amid negotiations on implementing the MOU, disagreements arose over its stance on the vital energy route, which led to a resumption in fighting last month.

Monday’s negotiations would be the first publicly acknowledged since early last month. Trump said the discussions will concern the Strait of Hormuz and led into nuclear talks.

He said that the three allies believe “a deal is imminent.”

Trump called off the attack after speaking with Saudi Crown Prince Mohammad bin Salman over the phone. Trump said Sunday that bin Salman warned him that the consequences of the attack would be unpredictable.

“I mean, will they be flooded with people pouring into their country,” he said. “A lot of bad things can happen.”

Trump said it would have been “the biggest attack since World War II” and “disastrous” for Iran.

The United States is seeking to restore freedom of navigation through the strait, while Iran is trying to maintain some form of control over commercial vessels that pass through it.

According to the nonpartisan, Washington-based Institute for the Study of War, Iranian negotiators may be willing to make what it called “limited compromises” with the United States over Tehran’s control of the strait, though what those concessions may be were not entirely clear.