More than 230 bodies of people believed to have been killed by Islamic State militants have been found in a mass grave in Syria's eastern Deir al-Zor province, a group monitoring the country's war said on Wednesday.
The bodies were believed to be members of the al-Sheitaat tribe which had battled Islamic State militants, the Britain-based Syrian Observatory for Human Rights said. Their deaths would bring the number of Sheitaat members killed by the ultra-hardline group to over 900, it added.