An IDF drone fired at a convoy of refugees fleeing southern Lebanon on Friday night, killing at least seven people and wounding 22, an Associated Press photographer said. The army said it was investigating the incident. The attack on the convoy was the most dramatic on a day of fighting Friday that saw air strikes pound south Beirut and border crossings to Syria, killing at least 15 others as ground fighting picked up intensity in the south of the country. Lutfallah Daher, the photographer, was with the convoy when it was hit near the Bekaa Valley town of Chtaura, about 30 miles north of the Litani River. Israel has said it would attack any vehicle on roads south of the Litani, assuming it was carrying Hizbullah weapons or fighters. The photographer said that when the convoy left the south Lebanese town of Marjayoun in southern Lebanon, it was made up of more than 600 civilian vehicles in addition to vehicles carrying 350 Lebanese soldiers and police. A few vehicles had left the convoy before it was hit, the photographer said. Daher lives in Marjayoun and was fleeing with his wife in one car. His mother, brother, sister-in-law and their child were in another car. None was harmed. Two armored UN peacekeeping vehicles were to have accompanied the convoy, Daher said, but were not present when IDF forces in Marjayoun gave the convoy permission to head north. IDF tanks and infantry took control of Marjayoun on Thursday. The IDF said no convoys had been coordinated with the army. The region around Marjayoun was hit by IAF planes and artillery during and after the Israeli advance.