(BBC News) Syria's government was responsible for a deadly chemical attack on a rebel-held town in the north-west of the country on 4 April, a UN report says.
The authors say they are "confident" Damascus used Sarin nerve agent in Khan Sheikhoun, killing more than 80 people.
"Today's report confirms what we have long known to be true," said the US ambassador to the UN, Nikki Haley.
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Syrian President Bashar al-Assad and his ally Russia have repeatedly said the incident was fabricated.
Syria's opposition and Western powers have said it was a Syrian government air strike on the area.
But Damascus and Moscow say an air strike hit a rebel depot full of chemical munitions.