Of course, who else could it have been? From AP, and Nicolei:
JAKARTA, Indonesia (AP) — Jemaah Islamiyah, a Southeast Asian terror group linked to al-Qaida, purportedly claimed responsibility for a deadly car bomb attack outside the Australian Embassy in Indonesia, saying it was punishing Australia for supporting the U.S.-led war in Iraq.
Indonesian investigators, meanwhile, said Friday that they believed the car bombing was a suicide attack, and were investigating if two of the nine people who died were the bombers. They had also blamed Jemaah Islamiyah soon after the attack Thursday.
In Australia, Prime Minister John Howard said another attack in Jakarta was a “distinct possibility.” Militants have repeatedly struck foreign targets in Indonesia, the deadliest when they bombed nightclubs on Bali Island, killing 202 people including many Australians.
“There has been a lot of ‘chatter’ as the intelligence agencies call it and a lot of evidence coming forward suggesting it (another attack),” he said. “The number of people they believe to be operatives would support the fear that there could be another attack.” He did not elaborate.