Add Yahoo as a preferred source to see more of our stories on Google. Six people have been killed in a strike in central Israel after Iran vowed to step-up its retaliation for the killing of its supreme leader in the surprise US and Israeli attack that launched the widening war.

Add Yahoo as a preferred source to see more of our stories on Google. American and Israeli forces have carried out strikes on cities across Iran, in what US President Donald Trump has described as "major combat operations".