Meanwhile, Central Java Police chief Insp. Gen. Didi Widayadi

Meanwhile, Central Java Police chief Insp. Gen. Didi Widayadi said 23 of the 26 bombs prepared by JI members had been planted in various locations and were ready to be activated, Antara reported.

"Twenty-three of the bombs had been planted and were ready to be activated at the targeted places," Didi said.

He said police had uncovered the plot after officers from the Australian Federal Police reexamined the explosives seized during a raid at a house in Semarang last week and the questioning of JI suspects arrested during the raid.

Didi declined to reveal the 23 places targeted by JI members.