The man said he was on a train in the 900-block of West Addison Street, near the Addison Red Line stop in Wrigleyville, about 3:15 a.m. when an unknown male suspect approached and hit him, according to CPD.
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There was a fight, and the suspect pulled out a small knife and stabbed the man, police said.
The man suffered multiple puncture wounds and was taken to Illinois Masonic Hospital in fair condition, according to CPD.
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No other injuries were reported.
The suspect fled in an unknown direction.
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A weapon was recovered on the scene, police said.
No one was in custody later Thursday morning, and Area Three detectives are investigating.
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