Guns mostly fell silent in Syria and Russian air raids stopped on Saturday, as a cessation of hostilities appeared to hold for its first day, described by the United Nations as the best hope for peace in five years of civil war.
Under the U.S.-Russian accord accepted by President Bashar al-Assad's government and many of his enemies, fighting should cease so aid can reach civilians and talks can open to end a war that has killed more than 250,000 people and made 11 million homeless.
Russia, which says it intends to continue strikes against areas held by Islamist fighters that are not covered by the truce, said it would suspend all flights over Syria for the first day to ensure no wrong targets were hit by mistake.