Israel and Iran have traded more missile attacks despite international calls for a halt to the fighting, with neither country showing signs of backing down as the conflict between the regional foes raged for a third day.

Israel hit more targets in Tehran and Iranian missiles fired at Israel killed at least 14, as the conflict entered a third day

"The full strength and might of the U.S. Armed Forces will come down on you at levels never seen before," Trump warned.

Israel and Iran have opened a new chapter in their long history of conflict. Israel launched a major attack with strikes early Friday that set off explosions in the Iranian capital of Tehran.

Israel bombarded Tehran, the Iranian capital, with a new wave of strikes on Sunday afternoon, as both sides dismissed international calls to de-escalate the conflict and warned of more to come in a clash that is rapidly expanding in scope and intensity.