Indonesian police have linked a suspect in Tuesday's deadly bomb at a luxury hotel in central Jakarta to the regional terror group Jemaah Islamiyah. But authorities say they cannot yet confirm that J.I. was behind the attack.

Police officials say their early investigation suggests that Jemaah Islamiyah is to blame for the bombing at the J.W. Marriot hotel.

Detectives on Friday said two J.I. suspects already in custody claimed that the man who may have driven a bomb-laden van to the hotel was someone they had recruited.

The man died in the blast, and his severed head was found in the rubble. The police have identified him as Asmar Latin Sani.

J.I. is a regional terror ring linked to the al-Qaida network. Police say they will not know for certain it carried out the hotel attack until they can arrest suspects.

The bomb tore through the lobby of the hotel Tuesday, blowing out windows, setting fires and destroying cars parked outside. At least 10 people were killed and more than 100 injured. All but one of those killed were Indonesian.

Indonesian President Megawati Sukarnoputri said Friday that international efforts to combat terrorism are not working.

"Regional plans of action to tackle such problems have long been established as part and parcel of Asian functional cooperation," the president said. "But suddenly these appear to be inadequate in the face of the like terrorist attacks, in the United States, in Bali and just a few days ago at the Marriott hotel in Jakarta."

Without mentioning J.I., the president called for an international effort to fight the threat of terror.

"It became clear that no single country could overcome this threat alone," she said. "The Indonesian view shared with the rest of the Asian members, it would take a global coalition involving all nations, all societies, religions and cultures to defeat this threat."

Police say J.I. carried out last October's Bali bombing, which killed 202 people. Within hours after the hotel blast, police began to point out similarities with the Bali attack.

The car bombs used in both were packed with the same type of explosives, triggered by a cell phone.

Also on Friday, the first man convicted in the Bali case signed a document authorizing his lawyers to appeal his sentence. Amrozi bin Nurhaysim was sentenced to death Thursday after being convicted of buying the materials and the van used to build the car bomb in Bali.