Syrian Arab Army soldiers found two mass graves which held dozens of bodies of Syrian soldiers and civilians killed by the so-called Islamic State (IS; formerly ISIS/ISIL), in western Raqqa on Friday, according to local media.Residents in western Raqqa passed on the information about the mass graves, stating that the discovered bodies were people that had been executed.The exact number of bodies is yet to be reported. The operation to recover the bodies is expected to take several days due to the scale of the two mass graves.