Deadly air strikes hit the Syrian rebel enclave of eastern Ghouta for a seventh straight day after the United Nations again delayed a vote on a ceasefire.

The Britain-based monitor of the war said at least 21 civilians were killed in fresh strikes on eastern Ghouta, including 12 in the main town of Douma.

It has said the strikes are being carried out by Syrian and Russian forces. Moscow has denied any direct involvement in the eastern Ghouta bombardment.