Gumla, July 06 (ANI): A village doctor, Raj Kishore Singh, was killed by Maoists in Gumla district of Jharkhand. Doctor's son, Deepak Kumar Singh, said the incident occurred in Mahadev Chutia village within Gagra police station limits in the district on Friday night. Villagers, though aware of the truth, refrained from speaking about the incident due to fear of the rebels and their threats. The reason for the killing is unknown and the Gumla police have sent the body for post-mortem.