The Gulf States have called for an emergency Arab foreign ministers' meeting on the rising bloodshed in Syria as Damascus shows no let-up in its deadly crackdown on protests.
The United Nations has said the death toll in seven months of protests in Syria against the rule of President Bashar al-Assad has reached 3,000.
UN High Commissioner for Human Rights Navi Pillay said at least 187 children were among the dead and that 100 people had died in the past 10 days alone.
The UN also says hundreds of Syrians have been arrested. Ms Pillay warned that Syria's "ruthless repression" threatened "full-blown civil war".
The government in Damascus blames armed "terrorist gangs" for the trouble, and says 1,100 members of the security forces have been killed.