A very preliminary news report from WNDU in South Bend, Ind., reports that multiple people have been stabbed at an Amtrak station in Niles, Mich. Tweets from riders suggest that something serious is going on.

Twitchy will pass on more details as they become available.

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Update: Reporter Stephanie Johnson is on the scene, although details are still slim.

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Update: ABC7’s Chuck Goudie has further details on the “stabbing train,” which was carrying 172 passengers.