Almost 100 rebel factions have agreed to respect an imminent cessation of hostilities in Syria, the main Syrian opposition group has said.
The High Negotiations Committee said Free Syrian Army factions and the armed opposition had signed up to the temporary truce from midnight Saturday.
The news came after Russia was accused of intensively striking rebel strongholds ahead of the cessation.
Russia said it was continuing to bomb "terrorists" in parts of Syria.
World powers agreed on 12 February that a truce would start within a week but that deadline passed and scepticism had lingered over the new plan.
The "cessation of hostilities" involves regime and rebel forces - but not the so-called Islamic State (IS) group and the al Qaeda-linked Nusra Front.
