New Delhi, March 21- The Central External Affairs Minister Sushma Swaraj yesterday said that all the 39 Indian workers who were abducted by the Islamic extremist group IS in Mosul in 2014 were killed by them. Dr . Zaid Ali , the Head of Iraq’s forensic department under the ministry of Health confirmed that most of the bodies have gun shot wound on head. He also added that when they got the dead bodies those became mere skeletons and they might be killed a year ago. Sushma said that whether they were killed 6 months ago or 2 years ago could not be guessed because the search operation for those dead bodies began only after General V.K. Singh reached there in July last year. Harjit Singh , one of the hostages who could save himself from the grip of the IS abductors said that almost all the victims were shot on head . The minister thanked the forensic department of the ministry of Health of Iraq for their support for conducting a proper investigation regarding this Issue.