An Iranian official has suggested technical talks with the United States are on hold as both sides accused each other of not sticking to an interim agreement.
Donald Trump has issued a stern threat to Iran after the US launched a fresh wave of strikes near the Strait of Hormuz, marking another escalation in the fragile ceasefire agreement.
Iran has threatened to retaliate to US strikes after President Donald Trump accused Tehran of breaching a ceasefire by carrying out a drone attack on a commercial cargo ship in the Strait of Hormuz.
The International Maritime Organisation has temporarily suspended an operation to escort ships through the Strait of Hormuz following an attack on a vessel.
The US Secretary of State made the pledge while wrapping up a Middle East trip aimed at selling the Trump administration’s interim agreement to sceptical regional partners.
A week after the two countries signed their interim ceasefire deal, their leaders have repeatedly disagreed in public about what that document actually means.
The US Senate has voted on a war powers resolution seeking to decide whether US military action against Iran should continue, although largely symbolic.