Five hundred Syrians, of whom 121 were children, were killed in seven days in the Syrian enclave of Al-Ghuta, The Syrian Observatory for Human Rights reported on Saturday.

The Britain-based monitor of the war has given an account of casualties for the week-long military offensive. The report came a few hours after the UN delayed a vote on a cease fire for the second time on Friday in order to give space for possible negotiations between conflicting parties.

The bombardments were undertaken by the Syrian regime and the Russian forces, the main ally of Bashar Al-Assad since 2015. Moscow has denied any involvement in Ghuta.

The UN held Russia responsible for holding international humanitarian efforts to ease the suffering of civilians in the war-torn Syria.

The American Permanent representative to the UN Nikki Haley condemned the delay, writing on her account on Twitter, "Unbelievable that Russia is stalling a vote on a ceasefire allowing humanitarian access in Syria.”

Haley went on, "How many more people will die before the Security Council agrees to take up this vote? Let's do this tonight. The Syrian people can't wait."