By Karishma Vaswani,
BBC News, Jakarta
Security forces have been targeting militant groups in Aceh in recent months
A new report published by a Brussels-based security think-tank says that Indonesia must not grow complacent after breaking up a new terror group.
The report says that extremists remain at large in the archipelago, and one of the key reasons they are able to operate is because of corruption.
The International Crisis Group says the security forces must be on guard.
The report details how the emergence of a new terror group in Aceh in February took Indonesian officials by surprise.
The discovery of the militant bases in Aceh raised fresh fears about the revival of extremism.
The report praises Indonesian police for their fast work in clamping down on the new group.
However, it warns that the job of eliminating terror cells is far from over.
It recommends a number of steps that Indonesia can take to improve its efforts to root out terrorism.
It says one of the key reasons fundamentalists are able to thrive here is because of corruption.
According to the report, corruption remains a lubricant for terrorist activities.
It adds that a number of those captured in the raids earlier this year were actually ex-prisoners.
The report suggests that Indonesia needs to monitor its prisons carefully so that those captured are not hatching plans to create new extremist cells while they are in jail.
But it also says that Indonesia should not use a Singapore-style Internal Security Act that allows officials to detain suspects indefinitely.
Those sort of measures could actually lead to more radicalism in the country, it says.