Trump, who has justified the war as necessary to prevent Iran from obtaining nuclear weapons, previously said the US would remove and destroy the uranium.

In Saturday’s post, he said: “When all is calm, we will go in and get the Nuclear Dust… and downblend and destroy it, whether in Iran, or the United States”.

“Hopefully, this process will all work out quickly, easily, and smoothly,” he added. “If it doesn’t, we have the ultimate alternative, hopefully never to be used again!”

Prime Minister Benjamin Netanyahu of Israel — which launched the war in tandem with the US in February — said Trump had promised him any agreement would include the removal of the enriched nuclear material.

In the streets of Tehran, there was scepticism the latest agreement would cross the finish line.

“I don’t think there is any deal soon,” said Saeed Sadeghi, 49. “I don’t trust their word.”

Fars news agency shared a video from Iran’s northeastern city of Mashhad showing dozens protesting the deal outside a foreign ministry building Saturday.

It showed women in black chadors chanted “death to dishonourable Araghchi, the infiltrator”, while waving red and black flags.