A Syrian opposition official said a fragile cessation of hostilities that took force early on Saturday faced "complete nullification" because of government attacks he said violated the agreement drawn up by the United States and Russia.<br />Countries backing the Syria peace process will meet at 3 P.M. in Geneva on Monday as France demanded information about attacks in breach of the cessation of hostilities.<br />Asaad al-Zoubi, head of the Saudi-backed opposition High Negotiations Committee's delegation to peace talks, said the truce had collapsed before it started, Al Arabiya al Hadath TV reported.<br />The United Nations hopes the cessation of hostilities agreement, which is less binding than a formal cease-fire and was not directly signed by the Syrian warring sides, can precede a more formal cease-fire.