New Delhi, April 17 -- US President Donald Trump on Thursday (April 13) said Iran has agreed to abandon its pursuit of nuclear weapons, calling it a major breakthrough in the ongoing standoff.

"The big thing we have to do is we have to make sure that Iran does not have a nuclear weapon," Trump said. "They've agreed to that. very powerfully."

He added that Tehran had also agreed to return enriched uranium buried deep underground following recent US strikes.

"They've agreed to give us back the nuclear dust that's way underground because of the attack we made with the B-2 bombers," he said. "So we have a lot of agreement with Iran."

Trump struck an optimistic tone on negotiations, saying prospects for a deal were "looking very good" and ...