Accusations

US accuses Iran of 'alarming provocations'

"An unchecked Iran has the potential to travel the same path as North Korea and to take the world along with it," Mr Tillerson said.

President Donald Trump earlier ordered a review of the Iran nuclear deal.

However, the US admits that Tehran is complying with the 2015 agreement.

Iran has so far made no public comments on the latest developments.

Iran has repeatedly denied accusations by the West that it was ever trying to develop nuclear weapons.