MARJAYOUN, Lebanon — Israeli strikes on Monday killed more than 350 Lebanese, including more than 60 women and children, Lebanese authorities said, in the deadliest barrage since the 2006 Israel-Hezbollah war as the Israeli military warned residents in southern and eastern Lebanon to evacuate ahead of a widening air campaign against Hezbollah.

An Israeli airstrike that targeted Hezbollah commanders in a Beirut suburb on Friday killed at least 37 people, including three children and seven women, the Lebanese health ministry said, and rescuers were still searching on Saturday for people missing in the rubble.