The US president said on Tuesday that the end to US operations was not dependent on reaching any deal with Iran, which has, in retaliation, effectively closed the crucial Strait of Hormuz to oil tanker traffic. Trump said when the US feels Iran 'won't be able to come up with a nuclear weapon, then we'll leave.'

Donald Trump warned the U.S. will completely obliterate all of Iran's electric generating plants, oil wells and Kharg Island if a peace deal is not reached.

The U.S. and Israel have carried out strikes against Iran for just over a month.