Police hostage negotiators were locked in a standoff Wednesday with a gunman authorities say intercepted a school bus, killed the driver, snatched a 6-year-old boy and retreated with the

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Police hostage negotiators were locked in a standoff Wednesday with a gunman authorities say intercepted a school bus, killed the driver, snatched a 6-year-old boy and retreated with the kindergartener into a bunker at his home.

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WPVI – Philadelphia
Wed, Jan 30, 2013 3:22 PM EST