Amnesty International said on Thursday a U.S.-led coalition campaign to oust Daesh from Syria's Raqqa had killed hundreds of civilians, and those remaining face greater risk as the fight intensifies in its final stages, the Daily Mail reported Thursday.

The rights group also said Russia-backed Syrian government forces had carried out indiscriminate attacks against civilians, reported to have included cluster and barrel bombs, in a separate campaign against the militants south of Raqqa city.