Amnesty International has urged the Indonesian and local authorities in Papua to implement immediate and effective measures to ensure security of Agustinus Aud, who is the spokesperson of the West Papuan National Committee.
This follows reports of a weekend abduction attempt by about 10 men in plain clothes, who claimed to be police.
The report says after some of the men had smashed some parts of his window, Mr Aud saw that two of the men were armed with rifles.
He reportedly refused to come out and managed to make a phone call to his friends asking them to immediately come to his house.
As soon as they arrived, the men left.
Amnesty has called for a full and impartial investigation into the attempted abduction and other threats against Mr Aud, publish the results and bring those responsible to justice in fair trials.
This incident comes amid a debate at the UN over human rights violations committed by Indonesian forces with impunity.