Police in Indonesia's Papua say unidentified people have shot and wounded three civilians and a soldier in three separate attacks this week.
The Jakarta Globe reports the Papuan deputy police chief Paulus Waterpauw saying two men were riding on a motorcycle in the provincial capital Jayapura when they were attacked by a gunman on another motorcycle late on Tuesday.
The two men, both aged 22, are critically hurt.
In a separate incident in Jayapura, a gunman shot a 25-year-old soldier riding a motorcycle.
On Monday, a 16-year-old high school student was shot and wounded by an unknown attacker.
No one has been arrested for the latest attacks, which came less than a week after a German tourist was shot and wounded in a drive-by shooting in Jayapura.
The police chief says he believes the attacks are linked and that elements of the separatist Free Papua Movement could be involved.