Trump acknowledged that Israeli Prime Minister Benjamin Netanyahu was considering a strike, which he said could spark a "massive conflict" -- leading to a US decision to draw down embassy staff in the region.

"We are fairly close to a pretty good agreement," Trump told reporters.

Asked about his discussions with Netanyahu, Trump said: "I don't want them going in, because I think it would blow it."

Trump quickly added: "Might help it actually, but it also could blow it."

Trump's Middle East pointman Steve Witkoff is set to hold a sixth round of talks on Sunday in Oman with Iran, which defiantly said it would raise levels of uranium enrichment -- the key sticking point in talks.

Trump again described himself as a man of peace and said he would prefer a negotiated settlement with Iran.

"I'd love to avoid the conflict. Iran's going to have to negotiate a little bit tougher -- meaning they're going to have to give us some things that they're not willing to give us right now," he said.