wants to set up an Islamic state across Southeast Asia.
, which draws inspiration from Al-Qaeda, has carried out dozens of bombings in Indonesia in the past decade including 2002 attacks in Bali that left more than 200 dead, mostly foreign tourists.
There was no immediate claim of responsibility for the attacks, but terrorism analyst Rohan Gunaratna said Jemaah Islamiyah
was the most likely.
Suspicion will fall on the Southeast Asian Islamist militant group Jemaah Islamiyah
or its allies.
Wahjono also officially labelled Jemaah Islamiyah
a terrorist organisation, paving the way for it to be officially banned.
While some analysts fear Bashir's release could spark more terrorist attacks, an expert on Jemaah Islamiyah
General Ansyaad Mbai, a top Indonesian anti-terror chief, said the latest atrocity bore the hallmarks of Jemaah Islamiyah
: "The modus operandi of Saturday's attacks is the same."
Members of one indigenous Al Qaeda affiliate, Jemaah Islamiyah
, is known to have assisted two of Al Qaeda's September 11, 2001 hijackers and have confessed to plotting and carrying out attacks against Western targets, including the October 12, 2002 bombing in Bali, Indonesia that killed approximately 200 people, mostly Western tourists.
"There are many more Jemaah Islamiyah
members on the loose in Indonesia," he said.
The suspects are accused of being members of Jemaah Islamiyah
, a regional Islamic militant group with links to Osama bin Laden's al-Qaida network.
is also thought to be behind Tuesday's bombing of the Marriot Hotel in the Indonesian capital Jakarta, in which at least 10 people were killed and 150 injured.
Indonesia responded to this bombing by conducting a professional and competent police investigation that made remarkable progress in solving the Bali attacks and in disrupting the Jemaah Islamiyah
terror network behind them.