IS accused of Syria mass atrocities
27 August 2014 Last updated at 23:04 BST
Islamic State (IS) militants have committed "mass atrocities" in Syria and have recruited children as fighters, the United Nations says.
In a report, investigators say public executions are a "common spectacle" in areas run by IS, one of the groups fighting against Syria's government.
The report also accuses the Syrian authorities of using chemical agents in eight separate incidents this year.
Jeremy Bowen reports.