At least 15 civilians were killed on Saturday in a barrel bomb attack on a rebel-held area of Aleppo, the Syrian Observatory for Human Rights monitoring group said. The Maadi district was reportedly hit in two separate attacks by regime aircraft just minutes apart. Rami Abdel Rahman, the director of the monitoring group, said most of the victims were people at a tent receiving condolences for victims of another attack in a neighboring district earlier this week. "There was a first barrel bomb and when people gathered and the ambulances arrived, a second barrel struck and there were more deaths," an AFP reporter working in the area said. The death toll is expected to climb, as dozens more were wounded in the attacks.