There is “convincing evidence” that sarin gas was used in a rocket attack in the Syrian capital, Damascus, last month, a UN report is to confirm.
US allegations that the government was responsible led to threats of military action and then a US-Russia deal for Syria to make safe its chemical arms.
World powers will now try to hammer out a UN Security Council resolution.
Earlier, UN investigators said they were probing 14 alleged chemical attacks in Syria since September 2011.
Source: BBC News