Investigators are looking into the death...

An officer, employed at an interior ministry agency which provides private security services on contractual basis, shot his colleague dead late on Friday while on duty at a prosecutor"s office in downtown Moscow.

Bagmet said accidental shot is considered a main version of the incident, though a conflict between the two officers is also being suspected.

Forensic experts took samples of blood from the suspect and the victim to check it for alcohol.

Russian President Dmitry Medvedev has recently signed a decree to streamline the law enforcement structure, in particular ordering staff cuts and instituting the rotation of senior personnel at the Interior Ministry.

In the recent high-profile police violence case, Denis Yevsyukov, who then was a police major, killed two people and injured seven in a Moscow supermarket in April last year.

MOSCOW, January 30 (RIA Novosti)