title: Russian serviceman in Chechnya kills four servicemen, then is killed, TASS reports
text: MOSCOW (Reuters) - A Russian serviceman in the Caucasus region of Chechnya killed four other servicemen on Monday, then he was killed by the members of an alert unit, TASS news agency cited a Federal National Guard Troops Service spokesman as saying. A man who opened fire was a senior lieutenant of National Guard Troops, TASS reported. 