A warplane bombed the outskirts of the rebel-held town of Harasta, east of Damascus, as helicopter gunships strafed a district of Syria's capital on Thursday, monitors said. The air force also bombarded towns in the northwestern province of Idlib, much of which is under rebel control, said the Syrian Observatory for Human Rights. The violence came a day after at least 152 people were killed across Syria -- 58 civilians, 48 rebels and 46 soldiers, said the Observatory. "Warplanes dropped three bombs on the outskirts of Harasta" in the Eastern Ghuta area home to some of the rebel Free Syrian Army's best organised and fiercest fighters, it said. More than 36,000 people, the majority civilians, have been killed in Syria since the uprising against Bashar al-Assad's regime broke out in March 2011, according to the Britain-based monitor. The watchdog collects its information from a country-wide network of activists, lawyers and medics in civilian and military hospitals.