Two days after terrorists spread nerve gas through Tokyo's subways, police were focusing on a possible culprit. In massive raids on 25 locations of the fringe Buddhist-Hindu sect Aum Shinrikyo, investigators found substantial amounts of a chemical used in the Mar. 20 attack. The group of about 10,000 believers has few known political aims but has gained notoriety for purportedly engineering the disappearance of some of its enemies and preventing followers from defecting. Aum Shinrikyo has not been formally charged with a crime.

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