The conflict also prompted a statement from G7 leaders, affirming support for Israel, while calling for a resolution to the escalating tensions in the Middle East.

Blasts have been heard in Tehran and sirens have sounded in Israel as US president convenes National Security Council.

U.S. President Donald Trump on Monday night cut short his participation at the G7 summit to leave Alberta, Canada, and returned to Washington, D.C., to focus on the conflict between Israel and Iran. French President Emmanual Macron announced Trump had made a cease-fire offer between the two countries.