A local official in Raqqa, Syria says workers have so far unearthed 313 bodies from a mass grave discovered last month near the northern city.
Yasser al-Khamees, who leads a team of first responders, says the bodies found include civilians, women, and children, and people believed to have been shot dead by Islamic State operatives.
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The mass grave was discovered in mid-June on the southern edges of Raqqa. The city was the de facto capital of the Islamic State group's so-called caliphate, which spanned territories in Syria and Iraq.
US-backed Syrian forces retook the city from ISIS in 2014 after gruesome battles that killed thousands and left the city in ruins.
Several other mass graves have previously been discovered in and around Raqqa.