Islamic state supporters in Raqqa Syria 24 August 2014
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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.