Police confirmed Tabuni's death saying he was shot in the hip and leg and died on his way to hospital on Thursday. [Facebook: Free West Papua Campaign] Radio Australia reporting
Indonesian security forces in Papua are guarding the region around Jayapura after a pro-Independence leader was shot dead, sparking riots.
Mr Tabuni was gunned down in the street by security forces near the town of Jayapura.
Papuan Independence activists say the force was led by members of the Australian trained counter-terrorism unit, Detachment 88.
But the unit's role could not be confirmed independently.
The Papua-based human rights group ELSAM has told Radio Australia's Asia Pacific program police were responsible for the shooting.
"Mako Tabuni with his friends, they went out from his house and maybe five to 10 metres from his house three cars, which are used by police, came to him and the police went out from three cars and they shot him," spokesman Farry Marisan said.
Police say Mr Tabuni was killed while resisting arrest but they offered differing accounts of whether he was armed at the time.
They blame the group for a series of unexplained shootings in recent weeks and they've launched sweeping raids on its supporters.
Mr Tabuni had been campaigning for an investigation into a series of recent shootings.
The committee had also been calling for a referendum on Papuan self-determination.
Riots sparkedNews of his death brought people out onto the streets of Jayapura and Waena and some of them torched shops and vehicles.
Television footage showed police inspecting burned out buildings and smouldering cars.
Waena locals have told Radio Australia police and special forces moved in after the violence broke out.