US and Iran threaten return to war after fiercest exchange of fire since truce

Ceasefire appears close to collapse as two militaries target each other after after Iran strikes three commercial vessels

Iran and the US have threatened to reignite their conflict after the most extensive exchange of fire since an interim deal was signed last month.

On a chaotic day at the Nato summit in Ankara summit, Donald Trump said the US would probably hit the country again on Wednesday night and renewed his threat to take control of the strategic Kharg Island in the strait of Hormuz - a move that could provoke Iran to hit energy installations across the Gulf states.