The strikes, which destroyed an eight-story building and left a crater in the ground, were the fourth in Beirut in less than a week.

The escalation comes after U.S. envoy Amos Hochstein traveled to the region in pursuit of a deal to end months of fighting between Israel and Hezbollah that has erupted into full-on war.

The envoy, Amos Hochstein, was in Israel and planned to meet with Prime Minister Benjamin Netanyahu, seeking a truce in the country’s war with the militant group Hezbollah.

US envoy Amos Hochstein arrived in Beirut in a bid to secure a cease-fire deal between Israel and Hezbollah, as the Lebanese group reportedly approved a new proposal to halt the hostilities, with some comments.

Hezbollah, still reeling from the killing of its leader Hassan Nasrallah and other commanders, has kept up rocket fire into Israel, including targeting Tel Aviv this week. Its fighters are battling Israeli troops on the ground in the south.

U.S. envoy Amos Hochstein said Wednesday progress has been made in the negotiations with Lebanon, while Hezbollah leader Sheikh Naim Qassem insisted that Israel cannot impose its conditions to stop the raging war.

Israeli airstrikes Saturday killed at least 11 people and injured dozens in central Beirut, officials said, as diplomats try to broker a cease-fire.

Amos Hochstein, the lead U.S. negotiator, said he had made progress on a trip to Beirut and would travel to Israel to try to secure a cease-fire agreement that has so far proven elusive.