A rogue Afghan soldier suspected of killing an Australian soldier last month has been tracked down and killed by coalition and Afghan forces.

NATO says the Afghan was killed Sunday in Khost province after pulling a gun on troops attempting to capture him.

Officials say a man believed to be the soldier's brother was detained for questioning.

The Afghan soldier had been on the run since the May 30 killing of an Australian soldier in Uruzgan province. NATO says the slain Australian was supporting mentoring efforts with the Afghan army.

In another development, NATO says one of its troops was killed Monday in a bomb blast in southern Afghanistan.