In Syria, two mass graves filled with "dozens of bodies" have been discovered in Raqqa province. <br/><br/>State media, the SANA news agency reported, the bodies of civilians and troops killed by the Islamic State group were discovered in two mass graves in the village of Wawi, near the northern city of Raqqa, once the de facto capital of the terrorist outfit. <br/><br/>The group had carried out public killings in its once self-declared caliphate, beheading, shooting and stoning perceived offenders to death, as well as drowning them in large pools while locked in metal cages.<br/><br/>An estimated 1,800 civilians were killed in Raqqa during the three years of Islamic State group occupation.