An Afghan policeman shot dead six other policemen in an outpost in southern Afghanistan early Thursday, a local government spokesman said, dpa reported.
The shooting in Sangin district of Helmand province was the latest in a series of shootings by Afghan security personnel of their local and foreign colleagues.
Omar Zwak, a spokesman for the governor of Helmand, said two national and four local policemen were killed by the gunman.
Zwak said it was unclear whether a dispute led to the killings or whether the shooter was a Taliban infiltrator.
Last week, an Afghan police officer killed seven of his colleagues in Greshk district of Helmand.