The incidents entangling both Lebanon’s official army and the U.N. peacekeeping mission in Lebanon raised alarm as Israel broadens its campaign against Hezbollah.

The Israeli military said its forces fired at a threat near a UN peacekeeping mission position on Friday in southern Lebanon, wounding two people.

An Israeli air strike in a densely populated area of Beirut, which killed at least 22 people, reportedly involved the use of a US-manufactured munition, according to a recent investigation by The Guardian.