Indonesia's anti-terror police have detained two Singaporeans linked to the Jemaah Islamiah militant group and possibly involved in a plot to attack Changi airport, a police source and media reports said on Thursday.
One Singaporean was arrested in Lampung province in Sumatra and another in Central Java province on Sunday, the state Antara news agency reported.
A senior police source who declined to be identified confirmed to Reuters the arrest of two Singaporeans among a number of other recent arrests but declined to elaborate.
The Koran Tempo newspaper quoted a police source as saying a series of arrests had netted three were suspects, including the two Singaporeans.
"They are suspected Singaporean fugitives, linked to the group of Mas Slamet Kastari," the paper quoted the source as saying.
Kastari, who is suspected to be the leader of the Singapore arm of JI shot to fame when he escaped from a prison in the city state last year. He was recaptured in Malaysia in April.
Kastari is the alleged mastermind of a plot to hijack a plane and crash it into Singapore's Changi Airport and was also accused of planning truck bomb attacks at several sites on the island.
One of the Singaporeans, who police suspect was an expert at faking docments, had been working as a pedicab driver in Lampung, according to the Antara news agency.
JI carried out a series of deadly attacks in Indonesia in recent years, including the 2002 nightclub bombings in Bali, which killed 202 people, including Indonesians and foreign tourists.
Indonesian security forces have since detained hundreds of militants and killed a number during shoot outs including JI bomb expert Azahari bin Husin.
A number of key suspects remain at large including Malaysian national Noordin Top, accused of masterminding a series of bombings in Indonesia.