Iran has not publicly rejected the ceasefire but tensions with the U.S. and Israel remain high following a conflict that has stretched over 12 days. Both Iran and Israel have claimed "victory" in the war. Iran has suffered damages to key nuclear and military infrastructure while its missiles have hit deep into Israeli territory.

Despite separate statements from the two countries saying they agreed to a truce, reports persisted of further airstrikes and counter-strikes.

Trump spoke ahead of flying to Europe to meet with NATO allies. A visibly frustrated President Donald Trump condemned Israel and Iran Tuesday morning for violating a ceasefire that he had heralded one day earlier.