DAMASCUS, Jan. 23 (Xinhua) -- A mass grave believed to be containing as many as 1,000 decomposed bodies was found Wednesday in the countryside of the Raqqa province, the former de-facto capital of the Islamic State (IS) group in northern Syria, a war monitor group reported.
The militants who are in control of the Fukhaikha area in Raqqa countryside found the mass grave and the bodies were killed when the IS was in control of Raqqa, according to the Syrian Observatory for Human Rights.
Several mass graves were found in Raqqa and other former IS-held areas in northeastern Syria.
The Kurdish-led Syrian Democratic Forces (SDF) captured Raqqa with the help of the U.S.-led coalition in 2017.
The SDF also succeeded to enter the last IS-held village in the eastern Euphrates region on Wednesday.