Three Hezbollah fighters and a Syrian were killed on Friday in an Israeli drone strike on their car in the south of Syria, a war monitor said. "A Syrian and three Lebanese Hezbollah fighters from the surveillance and missile-launching unit were killed in the Israeli drone strike on their rented car" in Madinat al-Baath town in the province of Quneitra, close to the Israeli-annexed Golan Heights, the Syrian Observatory for Human Rights head Rami Abdel Rahman told AFP.