The Russian National Guard says one of its officers shot and killed four other servicemen at a barracks in the Russian republic of Chechnya before guards fatally shot him.
The agency said in a statement carried by Russian news agencies that the incident happened Monday in Shelkovskaya, a Chechen village.
It said the officer fired on his comrades inside the National Guard barracks, then was shot and killed by guards on duty there.
The National Guard says a panel would be set to investigate the shootings.
The slayings come less than a month after a Russian soldier fatally shot three other servicemen during drills and wounded two others. He was tracked down and killed.