Who might be responsible for Jakarta bomb attacks

JAKARTA, Indonesia (CNN) - Indonesian authorities believe two suicide bombers checked into the JW Marriott Hotel in Jakarta and carried out coordinated bombings Friday morning, killing themselves and at least six victims and wounding more than 50 others.

It is unclear what group is behind the attacks on the Marriott and the adjacent Ritz-Carlton hotel, Indonesia's National Police Chief Gen. Bambang Hendarso said at a news conference. He warned that the death toll could rise.

Indonesian authorities have detained several witnesses and others for questioning, and have sent forensic evidence from the scene for testing, a spokesman for Indonesian President Susilo Bambang Yudhoyono said.

"It's all being studied now," Dino Patti Djalal told CNN.

Yudhoyono warned that it is still too early to determine who was behind the attacks.

CNN contributor Tom Fuentes spoke to John Roberts on CNN's "American Morning" Friday about what group may be responsible for the Indonesia bombings.