Amnesty International says it fears that two men detained in Indonesia's Papua province are being tortured.
The watch dog group says Daniel Gobay and Matan Klembiap are being detained at the Jayapura district police station.
It says police have allegedly tortured or otherwise ill-treated them and five other men while interrogating them about the whereabouts of two pro-independence activists.
Amnesty says the tortured men have not received medical treatment and have had no access to a lawyer since their arrests 11 days ago.
It says that a day later five of the men were released without charge but Mr Gobay and Mr Klembiap remain in police custody and are likely to be charged with possession of a sharp weapon under emergency regulations.