Residents of Syria's eastern Ghouta district said they were waiting their "turn to die" on Wednesday, amid one of the most intense bombardments of the war by pro-government forces on the besieged, rebel-held enclave near Damascus.

At least 38 people died on Wednesday. At least 310 people have been killed in the district since Sunday night and more than 1,550 injured, the British-based Syrian Observatory for Human Rights war monitor said.

Eastern Ghouta, a densely populated agricultural district on the Damascus outskirts, is the last major area near the capital still under rebel control. Home to 400,000 people, it has been besieged by government forces for years.