WARNING : GRAPHIC CONTENT . Graves were identified last week after 'dozens ' of ID cards found nearby . Cards belonged to army recruits massacred by ISIS in cold blood last June . Comment: We could n't prevent ourselves from breaking down in tears , ' says worker .
WARNING : GRAPHIC CONTENT . Graves were identified last week after 'dozens ' of ID cards found nearby . Cards belonged to army recruits massacred by ISIS in cold blood last June . Forensic teams have already dug up 20 bodies and expect to find far more . 'We could n't prevent ourselves from breaking down in tears , ' says worker .