In a related development, the South-west district police have confirmed that the pistol used in the Hyatt shoot-out case last Tuesday which injured a eunuch, was indeed a police pistol apparently used by the `psychopath' stalking south Delhi residents and the police for the past two months.

This came about after the police recovered the bullet from 22-year-old Bobby, the eunuch, who was shot at near the Hyatt Regency last week. The bullet had been fired from a .455 caliber pistol used by the police. The weapon is still feared to be in possession of the alleged psychopath.

A senior south-west district official said that ``though we have not sent the bullet for examination, it is confirmed that it was fired from a pistol used by the policemen in the capital''.

The number of incidents that the police have attributed to the cop-killer include two murders, two attempted murders and three robberies. Senior officers today cautioned policemen on beat duty to restrain themselves if they suddenly came across someone resembling the `psychopath'. ``We have taken this measure so that policeman don't take any action in haste without confirming that the suspect they are confronting is the alleged psychopath,'' a policeman said. The Sarojini Nagar police had earlier accosted a Doordarshan employee assuming he were the cop-killer.