The police took in 106 activists from the West Papua National Committee, or KNPB, for their involvement in an inauguration of its local governing body last week.
The KNPB is a pro-independence West Papuan political organisation with a wide following throughout Indonesia's Papua region.
The inauguration of the KNPB's Sorong governing structure included a mass worship celebration and drew Papuans from areas such as Tambrau, Ayamaru and South Sorong.