Man Held in Plot to Poison Water

Irish police arrested a man linked to a plot to kill up to a million people by poisoning England’s water supply unless British troops were pulled out of Northern Ireland, authorities said. Britain’s government said it kept the threat under wraps until the man’s arrest for fear of causing public panic or encouraging imitators. While stressing that it did not believe the plan--which involved dumping weed killer into fire hydrants--would have put people in serious danger, Britain’s Cabinet office said the threat “displayed enough technical detail to give cause for concern.”