Monitor: ISIS has murdered over 2,000 off the battlefield in Syria
The killings of mostly Syrians included deaths by beheading, stoning or gunshots in non-combat situations
Follow us on GoogleIraqi forensics team begin excavating 12 mass grave sites believed to contain the remains of around 1,700 Iraqis massacred last summer by Islamic State militants.(photo credit: REUTERS)ByREUTERSFollow us on Google