JAKARTA  - Twin bombs that tore through luxury hotels in Indonesia's capital Friday have exposed the complacency of Southeast Asian nations in fighting regional militant networks, analysts say.

At least nine people were killed and more than 40 were wounded, including foreigners, by bombs that exploded in the JW Marriott and Ritz Carlton hotels in Jakarta's upscale Mega Kuningan district.

The attacks are the first of their kind in Indonesia since 2005 and brought back painful memories of a bombing by the radical Jemaah Islamiyah (JI) network that killed 12 people at the JW Marriott in 2003.

Indonesian President Susilo Bambang Yudhoyono said the bombings were an "act of terrorism," but authorities have so far not pointed the finger at any group.

However, University of Indonesia political scientist Bantarto Bandoro said the choice as targets of hotels popular among Westerners suggested the attack could be the work of JI or related militant groups.

"The governments of Southeast Asia have failed and have not been effective in controlling these terrorists because they have been over-confident in their abilities," Bandoro said.

"These terrorists won't stop even though some of their people get caught. Their networks are very wide," he said, adding that regional governments will have to step up security coordination in the wake of the attacks.

Regional governments have made strides in recent years in curtailing JI, which has been responsible for attacks in the Philippines and Indonesia including 2002 and 2005 bombings on Bali that killed more than 200 people.

JI militants also have been convicted of plotting spectacular attacks on high-profile targets including Singapore's Changi airport.

Despite the capture and killing of key regional JI leaders over the years -- including the recapture of fugitive alleged Singaporean cell leader Mas Selamat bin Kastari in Malaysia in April -- some key leaders remain on the run.

The chief of a violent JI splinter group and the alleged mastermind of the 2002 Bali bombings, Malaysian-born Noordin Mohammad Top, could be one figure behind Friday's attacks, International Crisis Group analyst Sidney Jones said.

"If it was a suicide bombing, then it's certainly a possibility that this was done by Noordin's network," Jones said.

"Noordin is no longer acting in the name of JI. He's a splinter of JI," she said.

"It means that efforts to eradicate (Noordin's network) need to be stepped up. The seriously dangerous fugitives are still at large."

Unconfirmed local reports have said police chasing Noordin stumbled across bomb-making material in an Islamic boarding school in Cilacap district, Central Java, earlier this week.

Singapore-based analyst Rohan Gunaratna said Islamist militants had used flagging attention by regional authorities as an opportunity to regroup for fresh violence.

The attacks show that regional "governments will have to closely work together to dismantle the JI infrastructure," Gunaratna, of the S. Rajaratnam School of International Studies, said.

"Also they need to work on dismantling the propaganda, recruitment and fund-raising activities of JI. These activities have not been dismantled," he added.

"The bombings demonstrate that Indonesia should get its act together. If Indonesia took the threat seriously, this would not have happened."