Biden terms Hassan Nasrallah's killing a 'measure of justice'

President Biden extended United States's clear support for Israel's bombing campaign against Hezbollah in Lebanon, including a strike that killed the group's longtime leader, but also said the time has come for ceasefires there and in Gaza.

President Joe Biden called the killing of Hezbollah leader Hassan Nasrallah "a measure of justice for his many victims, including thousands of Americans, Israelis and Lebanese civilians."

In a statement one day after an Israeli air strike on a southern Beirut suburb killed Nasrallah, Biden reiterated US support for Israel's right to defend itself against Hezbollah, Hamas, and Houthis.

The strong support from Washington, Israel's top ally, came as Russia, several European countries and the United Nations warned of the killing's potential repercussions.

UN Secretary-General Antonio Guterres was "gravely concerned by the dramatic escalation of events in Beirut in the last 24 hours," spokesman Stephane Dujarric said.

"This cycle of violence must stop now, and all sides must step back from the brink. The people of Lebanon, the people of Israel, as well as the wider region, cannot afford an all-out war."

In his statement, Biden underscored the need for a diplomatic solution.

"Ultimately, our aim is to de-escalate the ongoing conflicts in both Gaza and Lebanon through diplomatic means," he said, mentioning a ceasefire proposal in Gaza and negotiations on allowing the safe return of residents to Israel and southern Lebanon.

"It is time for these deals to close, for the threats to Israel to be removed, and for the broader Middle East region to gain greater stability," he said.

Speaking to reporters after leaving church on Saturday, Biden said "it's time for a ceasefire" after one asked whether an Israeli ground invasion was inevitable.