Indonesian police have detained six suspected terrorists on Sumatra island, including people who allegedly took part in the 2004 truck bombing of the Australian embassy in Jakarta.

The swoop was a prelude to two raids in Aceh province on Monday in which police killed one suspected terrorist and arrested four others.

The man killed by police during a raid on a house in Aceh Besar district was identified as Enaltao, 38, who was suspected of assisting Indonesians in military training in the southern Philippines.

National police spokesman Edward Aritong said the six men arrested at a road block on Sumatra were part of a new terrorist group that was disrupted in February when police found a training camp in Aceh.

He says two of those suspects, identified as Ibrahim and Lutfi, had been arrested earlier for their roles in the bombing of the Australian embassy, an attack which killed 10 people.

Mr Aritong described Ibrahim as a “motivator” for trainee terrorists while Lutfi was a “fundraiser”.

Both men are believed to be accomplices of terror leader Noordin Mohammed Top, who was killed by police last September.

They had reportedly served time in prison and been released.

Mr Aritong says another suspect, Bayu Sena, was involved in the making of bombs intended for an attack on Indonesian president Susilo Bambang Yudhoyono last year.

The assassination plan was uncovered during investigations into twin suicide attacks on luxury hotels in Jakarta last July which killed seven people.

A fourth detainee, Pandu Wicaksono, was wanted for harbouring Noordin, whose network, dubbed Al Qaeda in the Malay Archipelago, carried out the embassy attack and the Jakarta hotel bombings.