SI Sanjay Kumar Gaur at Panapaur Kariyat outpost shot himself with the service revolver of a colleague, apparently due to mental distress, Senior Superintendent of Police Vivek Kumar said.
He died on the spot, Kumar said adding the body had been sent for post-mortem at Sri Krishna Medical College and Hospital.
A Forensic Science Laboratory team was on way from the state capital to collect evidence in the matter, the SSP said adding a probe was on to find out the circumstances in which the SI took the extreme step.