Indonesian police say they have arrested a suspected Islamist militant alleged to be a top aide to Malaysian extremist Noordin Mohammad Top.

Local media say anti-terror security forces captured Subur Sugiarto on a bus in Central Java on Wednesday.

Several police sources said Subur Sugiarto was part of Top's inner circle of accomplices.

Top is a senior member of Jemaah Islamiah, an Islamist militant group seen as the Southeast Asian arm of al-Qaida. He is blamed for helping mastermind a string of bombings in recent years in Indonesia, including the 2002 Bali nightclub attacks that killed 202 people.

Some information for this report was provided by AFP and Reuters.