Indonesia's Detachment 88 anti-terror squad arrested several terror suspects in two near-simultaneous raids yesterday evening in Central and East Java provinces.

A suspect was arrested in the raid in Central Java's Sukoharjo regency, where evidence was also seized that showed a bomb attack plan in or near Jakarta might be under way.

The suspect, identified by police as Abu Karim, was arrested at his rented house, state news agency Antara reported, citing Sukoharjo police chief Andy Rifai.

Separately, news website Detik.com reporting from East Java said several terror suspects were picked up in a raid at 7pm in Mojokerto town, citing a witness, Mr Didik Hardi Santoso, who lived in the neighbourhood. Local police confirmed the raid to Detik.com.

In Sukoharjo, police seized a manual on bombmaking, books on jihad, a 9-volt battery, two pieces of pipe, wires, nails, ball bearings and a Greater Jakarta map. A passport with the name Yudha Saputra, thinner, acetylene, a laptop and a book on intelligence were also taken.

"The Detachment 88 anti-terror squad should have further information, including what terrorist network he (Abu Karim) is linked to," Antara quoted Lieutenant-Colonel Andy as saying.

Indonesia's counter-terrorism forces have been on high alert recently after detecting elements of domestic militants closing in on Jakarta. The country also tightened surveillance on citizens recently deported after trying to link up with militant group Islamic State in Iraq and Syria via Turkey.