A constable, 46, posted at the residence of BJP MP Brij Bhushan Sharan Singh has shot himself dead on Thursday.
Around 4.25 pm information was received about an incident where the PSO to MP, Unish Kumar of Security Unit of Delhi Police shot himself, official said.
The constable, Narela resident, killed himself with his service pistol. No suicide note has been recovered from the spot.
PCR reached the spot and found the body of the PSO lying in pool of blood on the floor with entry and exit wounds in his head. He was immediately taken to the hospital. Police have initiated the further inquiry.