At least 110 civilians were killed or wounded in an explosion at a petrol station in the village of Ain Issa, in Raqa province in northeast Syria, the Syrian Observatory for Human Rights said. “Lawyers and activists in the area say the blast was caused by aerial bombardment,” the Britain-based watchdog added. The human rights group, which has a network of activists across Syria, cited an activist in the region saying that more than 110 people were among the dead and wounded. Air crash in Damascus Earlier on Thursday, a Syrian military helicopter that went down outside the capital Damascus crashed after an accident with a civilian aircraft, state television said. “This morning’s helicopter crash resulted from an accident in the air when the helicopter’s rotor clipped the tail of a Syrian Air plane carrying 200 passengers,” the broadcaster said. “The civil aircraft has landed and all 200 passengers are safe,” it added, citing both air traffic controllers at Damascus airport and Syrian Air. Earlier on Thursday, the Syrian Observatory for Human Rights reported the helicopter had been downed by rebels following a series of explosions in the restive town of Douma, northeast of Damascus. Activists in the town contacted by reporters said they knew the helicopter had gone down but had no information as to why.