Malaysia's police chief says a Pakistani and two Malaysians have been detained in connection with last month's bombing of a shrine in Bangkok that killed 20 people.

Inspector General Khalid Abu Bakar told reporters Monday that the three were detained a few days ago following a tip-off by Thai authorities. He said one of the Malaysians is a woman.

He said Malaysian police will investigate and work with Thai authorities on the detainees. The Aug. 17 blast at the Erawan Shrine in the Thai capital killed 20 people, including five Malaysians from one family, and injured more than 120.

He did not give details or say when the three will be formally charged, or what the charges would be.