But in the hours before the ceasefire took effect early in the morning, Israel said it had killed “hundreds” of Iranian security personnel in bombing raids in Tehran, while an Iranian missile pierced Israeli air defences, hitting a residential building in Beersheba, killing at least four people.

The US president is due to arrive at the Nato summit shortly after earlier accusing Israel and Iran of violating the truce.

President Donald Trump says Israel is going to “turn around” its jets and stop attacking Iran and their ceasefire “is in effect" after briefly faltering.