Pirates have attacked a Malaysian tugboat and kidnapped three Indonesian crew members in the Sulawesi Sea.
Five gunmen, armed with assault rifles, boarded the boat in Malaysian waters off the eastern state of Sabah, on Borneo island, before fleeing towards the southern Philippines.
There are no reports of a ransom demand.
A district police spokesman says he believe the kidnappers are from the Abu Sayyaf rebel group.
The Abu Sayyaf is a Muslim militant group in the Philippines notorious for kidnappings for ransom.