BEIRUT – Israeli warplanes swooped low over Lebanese villages Sunday in a menacing show of force apparently aimed at the Hezbollah guerrilla group after a mysterious raid by an unmanned aircraft that was shot out of Israeli skies over the weekend.

Israel still was investigating Saturday’s incident, but Hezbollah quickly emerged as the leading suspect because it has an arsenal of sophisticated Iranian weapons and a history of trying to deploy similar aircraft.

The Israeli military said the drone approached Israel’s southern Mediterranean coast and flew deep into Israeli airspace before warplanes shot it down about 20 minutes later. Israeli news reports said the drone was not carrying explosives and appeared to be on a reconnaissance mission.