Driver extricated after colliding with school bus on Chicago's North Side

A 39-year-old man was critically injured in a three-car crash involving an unoccupied school bus Saturday morning, Chicago fire officials say. 

Fire officials responded to a pin in crash near Caldwell Avenue and Devon Avenue in Edgebrook just after 6 a.m.

One of the drivers was extricated from his vehicle and taken to Luthern General Hospital. 

Three people involved in the crash refused further medical attention on scene. 

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No additional information is available at this time.