A police head constable, attached to the Kachanapally police station under Komararam limits of Illendu mandal, was killed on the spot due to a pistol misfire.
Police said that the deceased, Batti Santosh Yadav, 30, who was on night duty, died of gunshot injury to his head while inspecting arms in the early hours.
The body was shifted to the Government Hospital at Illendu.
The discharge of the gun during a post protection weapon drill was stated to be accidental.
Yadav hailed from Gavicharla village in Sangem mandal of erstwhile Warangal district. He was in the Telangana State Special Police sixth battalion, and was attached to Komararam under the Yellandu police sub-division, the officials said.