Dozens of people have been killed by Israeli strikes in Lebanon, including 20 who died after a strike flattened a multi-story residential building in central Beirut overnight, according to Lebanese officials.

The death toll from an Israeli strike on a densely populated area in central Beirut on Saturday has reached 29, Lebanon's Health Ministry said on Sunday. Another 67 people were injured, the ministry said,

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.