The Syrian government began new air strikes on Sunday in the Syrian rebel-held town of Douma, in the eastern Ghouta region on the outskirts of Damascus -AFPBEIRUT, March 23 (Reuters) - Air strikes hit a rebel-held enclave of Syria's eastern Ghouta region on Friday despite a ceasefire that the area's controlling rebel group had said was agreed to come into force at midnight, the Syrian Observatory for Human Rights said.On Thursday a spokesman for rebel group Failaq al-Rahman said the ceasefire had been agreed in principle.The Britain-based Observatory, a war monitor, said that air strikes hit Ain Terma and Zamalka on Friday morning and that pro-government forces had advanced into a large part of the town of Hezzeh after the midnight ceasefire deadline.