More than two million Syrians have fled their country, and many more have been displaced internally.
Meanwhile, Syrian President Bashar al-Assad said he would comply with a plan to rid his country of chemical weapons.
"Of course we have to comply. This is our history, we have to comply with every treaty we sign,`` he told Italy`s RAI News 24.
On Friday, the UN Security Council passed a binding resolution to eliminate Syria`s stockpile of chemical weapons by mid-2014.
Inspectors from the Organisation for the Prohibition of Chemical Weapons (OPCW), which is tasked with implementing the plan, are expected to leave for Syria shortly.
A separate team of inspectors, from the UN, has been investigating allegations of chemical weapons attacks and was hoping to finish its work in Syria on Monday.
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