Update, Saturday, 1 p.m. -- Michael Williams, 44, of Saginaw is charged with four counts of attempted murder, The Detroit News reports.
Victims were treated at a hospital, WWJ reports. It's still unclear what led to the stabbings.
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Craziness broke out on an Amtrak train #364 Friday evening in southwest Michigan when a man apparently stabbed four people.
The train was parked at the station at Niles, Mich., near the Indiana border around 7 p.m. when the incident happened, Mark Hicks of the Detroit News reports.
Victims are a conductor, a woman and two men. Their condition was not immediately known. It's unclear what triggered the violence.
The suspect is 44 and from Saginaw, The News reports. The train was traveling from Chicago to Port Huron.
