Syria has declared a ceasefire during the Muslim holiday Eid al-Adha, although rebel forces are sceptical that it will hold.
The truce, due to last from Friday to Monday, has been brokered by United Nations and Arab League envoy Lakhdar Brahimi.
Syria’s army command says it will suspend military operations, but reserves the right to respond to rebel attacks.
Opposition forces are divided. The Free Syrian Army says it will honour the truce, but has demanded the release of detainees by Friday.
Islamist group Ansar al-Islam, however, will not commit to the ceasefire, saying fighters do not believe government forces will stick to it.
The Syrian conflict has already lasted 19 months, and killed an estimated 32,000 people according to activists.
United Nations aid agencies plan to scale up their activities during the brief lull in the violence, aiming to get help into areas that have been difficult to reach due to fighting.