QUETTA - Kidnappers have killed one of the abducted employees of a US-based NGO, Mercy Corps, reliable sources told The Nation late Sunday night. Unidentified gunmen had kidnapped four Pakistani employees of Mercy Corps, including Islamabad-based Dr Asif, provincial coordinator Iftikhar Shafiq, assistant programme officer Bebarg Suleman and Habibullah, driver, as they were heading towards Qilla Saifullah from Zhob in February this year. According to the sources, the abductors had slaughtered Habibullah and dispatched a video footage to the families of the victim and other three officials, warning them if the ransom was not paid within next few days, the remaining three would also be killed. The sources said the kidnappers had shifted the NGO officials to the tribal areas and were demanding Rs100 million ransom for their safe release.