The capture of Malaysian extremist Noordin Mohammad Top would not end the terror attacks that have rocked Indonesia because other key figures remain on the run, an anti-terror official warned.

Petrus Reinhard Golose, deputy commander of Indonesia's Detachment 88 anti-terror unit, said that the capture of Noordin, who now tops a list of most-wanted terrorists in the region, would only be a start.

"People mention that if we catch Noordin, terrorism in Indonesia is finished - no. It is still dangerous," Golose told an international anti-terror seminar in the Indonesian capital.

Noordin, along with his slain compatriot Azahari Husin, were once key members of the al-Qaeda-linked Jemaah Islamiah (JI) regional network, blamed for attacks such as the 2002 Bali bombings which left 202 people dead.

But experts have said they suspected Azahari and Noordin had split from JI to form an even more hardline group. Indonesia's police chief General Sutanto also said last month that Noordin had declared himself leader of a previously unknown group, Tandzim Qoedatul Jihad.

"Not only Noordin Top is dangerous," Golose said, adding that authorities were also hunting Abu Dujana, whom Golose said was now thought to head JI.

No longer part of JI

Dujana, a known JI member, was a teacher at the Lukmanul Hakiem Islamic boarding school set up by the JI leadership in Johor in the early 1990s.

Golose said that Noordin's cohorts were "not JI anymore".

They are "still dangerous because now they change, (they are) not JI anymore, now they change their frame of organisation... This is the last information we found," he said.

He said Noordin's followers were split into groups focusing on particular tasks, such as security and intelligence, and logistics, but he did not elaborate.

Golose said it was not known when the changes within JI had begun to take place, but a document signed by Noordin in which the new group was first mentioned was dated Oct 18, 2005.

The last attack linked to Noordin and Azahari was a triple suicide bombing on the resort island of Bali in October last year, which left 20 bystanders dead.