JAKARTA: Indonesian police said Thursday they had found six unexploded bombs similar to one detonated by a suicide bomber inside a police mosque last month. National police spokesman Boy Rafli Amar said the improvised devices appeared to have been prepared for suicide attacks in the mainly Muslim archipelago of 240 million people. “They planned to use the six pipe bombs for another terror attack like the one which was carried out by Syarif,” he told reporters, referring to the mosque bomber's name. Thirty people were wounded in that incident. The bombs were found in a river in Cirebon city on Wednesday, just days before leaders of the Association of Southeast Asian Nations (ASEAN) are due to arrive in Jakarta to attend a regional summit. More than 6,000 police and military personnel are ready to secure the event, which comes amid heightened tension following the killing of Al-Qaeda leader Osama bin Laden by American commandos in Pakistan Sunday.