The suspects involved in the Bali bombing and in a deadly bomb at a McDonald's restaurant know each other, Indonesian police have said.

National Police Chief Da'i Bachtiar said he believed a string of bomb attacks across Indonesia in the past two years were also related to October's Bali bomb and last week's attack at a McDonald's on the eastern island of Sulawesi.

"All who were arrested (over the Bali and Sulawesi blasts) know each other. We are developing it," the police chief told reporters after a cabinet meeting.

Three people, including one of the bombers, were killed in the McDonald's blast last Thursday in Makassar, the provincial capital of South Sulawesi.

More than 190 people died in the 12 October nightclub bombings in Bali. The Australian Government on Thursday put the final Australian death toll at 88 and said all the victims had now been identified.

Key arrests

Police have arrested six people suspected of involvement in the Sulawesi bombing, and three more suspects are on the run.

More than 15 people have been arrested over the Bali attacks, suspected of varying degrees of involvement. The key Bali suspects being detained are:

Mukhlas, alias Ali Gufron, the alleged operations chief of regional terror group Jemaah Islamiah (JI);

Imam Samudra, who is believed to have masterminded the bombing;

Amrozi, a younger brother of Mukhlas, who is said to have provided the van used in the blast.

Mukhlas was among eight suspects who were transferred to Bali on Wednesday from central Java.

Indonesian police are yet to charge any of the Bali suspects

Police on Thursday said they were preparing to hand their case to prosecutors as soon as possible. Under Indonesian law, it is up to prosecutors to press charges once police have filed enough evidence.

General Bachtiar said investigators were working hard to ensure there were "no loopholes" in the case.

He denied reports that a key suspect in the Sulawesi blast, Agung Abdul Hamid, had been arrested on Wednesday.

Police are trying to prove a link between the Bali suspects and JI, which foreign governments and some Indonesian officials have linked to Osama Bin Laden's al-Qaeda network.