MANOKWARI, Indonesia (AFP) - Indonesian police in restive Papua on Saturday detained a Ukrainian tourist attending a prayer session to commemorate the 51st anniversary of the region's movement for independence.

Artem Shapirenko, 36, was detained by police in the town of Manokwari in western Papua where around 50 people took part in a prayer at the traditional leaders council building. It was unclear why he had been held.

Shapirenko, wearing a Bob Marley T-shirt, held his fist in the air and yelled "Free Papua" in Indonesian as police officers ushered him into their vehicle, said an AFP reporter in Manokwari.

A photocopy of the man's tourist visa, obtained by the police, showed it had expired in July this year.