Sirens sounded in Israel as Iran launched dozens of ballistic missiles in retaliation for Israel's strikes on its nuclear facilities.

Israel and Iran have begun a new round of attacks, as the conflict between the two heavily armed rivals enters its fourth day.

Israeli Prime Minister Benjamin Netanyahu expressed support for killing Iran's Supreme Leader Ali Khamenei to end their ongoing military conflict, despite President Trump reportedly rejecting a plan to do so.

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

U.S. refueling aircraft and warships have been dispatched to safeguard U.S. interests as the deadly conflict shows no sign of abating.