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 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.

Israeli airstrikes Saturday in central Beirut killed at least 20 people, officials said, as the once-rare attacks on the heart of Lebanon's capital continued without warning while diplomats scrambled to broker a cease-fire.

The strikes at 4 a.m. destroyed an eight-story building in central Beirut and left a crater in the ground. Also on Saturday, a drone strike killed two people and injured three in the southern port city of Tyre, according to the state-run National News Agency.

Saturday’s attack completely demolished a multi-story building in a densely-populated neighborhood. Israel did not say who the strike’s target was.

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

Airstrikes targeting Beirut’s southern suburbs resumed on Thursday, November 21, the Lebanese National News Agency said.Footage by journalist Nafiseh Kohnavard shows a cloud of smoke and dust rising in southern Beirut.

Lebanon’s Health Ministry said 66 people were wounded in the strikes, which were the fourth in central Beirut in less than a week.

The escalation comes after a U.S. envoy traveled to the region to pursue a deal to end months of fighting between Israel and Hezbollah.