Indonesia's national police have confirmed the arrests of 10 terrorism suspects and the seizure of about 20 explosive devices in south Sumatra.

Police say the suspects are part of a "terror network" linked to Jemaah Islamiyah (JI) and are connected to Malaysian extremist Noordin Mohammad Top, who is being hunted for allegedly masterminding several bombings including the 2002 Bali attacks which killed more than 200 people.

They say at least one of them is also associated with Mas Selamat bin Kastari, the alleged leader of JI's Singapore operations who escaped from prison there on February 27.

Police have not named the suspects or revealed details of their alleged plot, except to say they were planning to bomb targets in Indonesia.

Our correspondent in Jakarta, Geoff Thompson, says a suspected terrorist, believed to be a Singaporean national, was arrested in Sumatra on June 28.

This led to the arrest of nine more men who have since been transferred to police custody in Jakarta.

Indonesian police have also confirmed the seizure of about 20 explosive devices, including 14 pipe bombs - five packed into plastic containers - and an unknown quantity of a potassium product used to make explosives.

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