Jakarta – A former boss of Indonesia's flag carrier was released from jail on Monday after serving a one-year sentence for assisting in the murder of a prominent rights activist, a report said.

The high-profile activist, Munir Said Thalib, died in 2004 on a flight from Jakarta to Amsterdam, poisoned with arsenic by a Garuda Indonesia pilot accused of links to Indonesia's powerful intelligence agency, BIN.

Indra Setiawan was detained on April 14 last year. In February, a court sentenced him to a year in jail minus time already served.

The state Antara news agency said Setiawan was released from police custody on Monday morning, although police could not be immediately reached for independent confirmation.

Setiawan was charged with falsifying documents that allowed the Garuda pilot, Pollycarpus Budi Priyanto, to travel on Munir's flight. Priyanto is serving a 20-year prison sentence for murdering the activist.

Munir's case has drawn widespread international attention and is seen as a test of how far the Indonesian government has reformed since the 1998 end of former dictator Suharto's regime.

Munir provided legal counsel for victims of officially sanctioned violence during Suharto's often brutal 32-year rule. Human rights groups have long accused BIN of involvement in the killing, which it has denied.