Reports from Indonesia say police have arrested seven people in Papua province for carrying knives and documents detailing a plan to create disorder.
This came as hundreds of Papuans in Jayapura commemorated what they call independence day.
The Jakarta Post newspaper quotes a police spokesman as saying the plan carried by the seven was to stage huge rallies, to attack government offices and to occupy vital assets such as the Freeport mine compound and gas fields.
The paper reports that the situation became tense during the flag-hoisting ceremony when people refused to salute the Indonesian flag and instead tried to lower it but were prevented from doing so by security personnel.
Police have also confirmed three companies of the security forces were deployed.
In a speech, the deputy chairman of the Papua Presidium Council, Tom Beanal, said the main agenda of the Papuan people next year would be to focus on reconciliation, consolidation and peace diplomacy.