Police have confirmed they made the arrests in the West Papuan city at a prayer event held by the West Papua National Committee, or KNPB, to celebrate their eighth anniversary.
The police disbursed the assembled KNPB crowd, accusing them of separatism as the congregation yelled their demand for West Papuan independence.
All but seven of the 106 taken to the main Sorong police station were soon released.
The Jakarta Post reported the KNPB as saying police accused the seven of treason and provocation.
