Syria's government has accepted a proposed cease-fire but reserved the right to respond to any violations. The main opposition and rebel umbrella group also approved the deal but set its own conditions. Here's what we know about the agreement:
— The truce, engineered by the U.S. and Russia, is set to take effect at midnight Friday local time.
— It does not cover the Islamic State group, Syria's al-Qaida branch known as the Nusra Front, or any other militia designated as a terrorist organization by the U.N. Security Council.
— It's not clear exactly where along Syria's complicated front lines the fighting would stop and where counterterrorism operations could continue. Also unresolved are how breaches in the truce would be dealt with.
— The Syrian Foreign Ministry stressed the right of its military "to retaliate against any violation" by armed groups. The opposition's High Negotiations Committee said acceptance was conditional on the Syrian government ending its siege of 18 rebel-held areas, releasing detainees and halting aerial and artillery bombardment.