A Syrian opposition official said a fragile cessation of hostilities that began on Saturday faced “complete nullification” because of government attacks he said violated the agreement drawn up by the United States and Russia.

Asaad al-Zoubi, head of the Saudi-backed High Negotiations Committee’s delegation to peace talks, said the truce which came into effect early on Saturday had collapsed before it started, Al Arabiya al Hadath TV reported.

“We have alternatives to protect our people” if the international community could not, it quoted him as saying without elaborating.

Zoubi added there were “no indicators” that the ground was being prepared for peace talks, which the United Nations has said it plans to reconvene on March 7.