Police in Java believe they have thwarted a major plot by Islamic militants, al-Qaeda linked Jemaah Islamiyah, the group blamed for the notorious Bali bombing last year which killed many tourists. A large cache of explosives was found in the Javanese town of Semarang, and police believe two packages of explosives have already been delivered to an unknown location in Jakarta. It would behoove western travelers to exercise caution when attending gatherings of foreigners in churches, restaurants, and clubs.