Tajik security forces have conducted an operation in the eastern part of the country, where fighting with militants broke out in September 2010.
Interior Ministry forces raided a building in the mountainous Rasht Valley area where a group of militants were sheltering.
Interior Ministry official Tohir Normatov said Alovuddin Davlatov, a former field commander from the civil war-era Tajik opposition, was among eight people killed in the operation.
Alovuddin Davlatov was one the militant leaders the authorities blame for an ambush on a military convoy in September that left 28 servicemen dead.
About 100 people -- military, militants and civilians -- have been killed in the Rasht area since September.
compiled from RFE/RL and agency reports