Jakarta  - Indonesian police said Wednesday they arrested five Muslim extremists suspected of plotting to attack a major fuel depot in the capital Jakarta.

National police spokesman Brigadier General Sulistyo Ishaq said anti-terror operations also netted bomb-making materials, weapons and ammunition during a raid Tuesday morning at a house in the North Jakarta suburb of Plumpang.

Ishaq said the explosives were a sophisticated version of those used in the 2004 Australian embassy bombing in Jakarta.

The five suspects were identified as Rusli Mardani, alias Wahyu Ramadhan, Nurhasani, alias Hasan, Imam Basori, alias Basar, Muntasir and Budiman, he said, adding that a manhunt was continuing for two other suspects.

One of the suspects, Ramadhan, was renting a house near the country's largest fuel depot, Ishaq said.

He said Ramadhan was also allegedly involved in the religious conflicts in central Sulawesi province and also in a shootout with police in early 2007 during a raid against terror suspects.

The suspects are believed to have ties to Jemaah Islamiyah, the South-East Asian terror group blamed for a series of bombings in Indonesia that have killed more than 240 people.

Indonesia, which has the world's largest Muslim population, has been hit by a string of terrorist attacks since 2000. They include bombings on the resort island of Bali in 2002 and 2005 and on the Australian embassy in 2004. (dpa)