Senior Biden administration officials said that they were still assessing the situation in Lebanon and their next steps, warning that it was difficult to predict what might follow after the death of Hezbollah leader Hasan Nasrallah from an Israeli airstrike.

The Israeli military said the air force had "struck dozens of Hezbollah terror targets in Lebanon, including launchers that were aimed toward Israeli territory, structures in which weapons were stored and additional Hezbollah terrorist infrastructure".

Iran’s supreme leader has said the death of Hezbollah leader Hassan Nasrallah "will not go unavenged", a day after he was killed in an Israeli air strike in Lebanon. Ayatollah Ali Khamenei announced five days of mourning in Iran in response to what he called the "martyrdom of the great Nasrallah",

Israeli Prime Minister Benjamin Netanyahu said Saturday the killing of Hezbollah leader Hassan Nasrallah was "necessary" while U.S. President Joe Biden said it represented "a measure of justice" for Hezbollah's victims.

BEIRUT—Hassan Nasrallah and other senior leaders of Hezbollah were under siege as they gathered Friday in a bunker more than 60 feet beneath the surface of a bustling working- class neighborhood in southern Beirut.