An unexploded bomb found at a hotel in Jakarta bears the trademarks of one of Indonesia's most active suspected bomb makers, police said Saturday.

Bomb-making materials were found in a search of a house belonging to Noordin Mohammad Top's father-in-law. police told The Wall Street Journal. Top allegedly is a leader in the Jemaah Islamiyah terrorist group and involved in most recent major bombings. He is being sought for his alleged part in the Bali bombings in 2002.

The search in Cilacap, a port on the island of Java, was carried out Tuesday as part of a more aggressive search for Top even before Friday's bombings. Ansyaad Mbai, head of counterterrorism in the Security Ministry, told the Journal the similarity was not definitive but was striking.

"The bomb in the Marriott was similar to ones we found in Cilacap," he said.

Officials said the suicide bombings Friday at the JW Marriott and Ritz Carlton hotels in Jakarta killed nine people, increasing the toll from eight. The death toll included the bombers, who had not yet been identified.

Three Australians, including an embassy trade official, and a New Zealander were among the dead. All four were attending a talk by a U.S. business consultant based in Indonesia.

The rest of the dead were Indonesians. At least 53 people were injured, including 37 Indonesians, police said.