The leader of the main Syrian opposition group has said that the chances of a truce proposed by the United Nations (UN) for a Muslim holiday this week are slim, partly because the plan is too vague.
The UN-Arab League envoy to Syria, Lakhdar Brahimi, has proposed that both sides lay down their arms during Eid al-Adha, a four-day holiday which begins on Friday.
However, neither Syrian president Bashar Assad nor rebels fighting to topple him have committed to a ceasefire.
Abdelbaset Sieda, head of the opposition Syrian National Council, told the Associated Press that rebels are willing to halt fighting during the holiday, but will respond if attacked.
Mr Sieda said he doubts the regime will honour the ceasefire and that Mr Brahimi does not have "any mechanism to observe the situation".