The prospect of an imminent agreement to end the conflict between the US and Iran again seems unlikely, with the warring sides exchanging strikes and uncompromising rhetoric.
The attacks come days after the US said it was moving into a new phase – a sweeping economic blockade against Iran and countries which trade with it.
The US aim was to force Iran to negotiate and to stop its attacks on shipping in the Strait of Hormuz. The key commercial shipping route has been effectively closed since the US and Israel started the conflict in February.
