The Chicago Transit Authority says it was forced to shut down service briefly on its main north-south rapid transit line because of an unauthorized person on the tracks.
CTA spokeswoman Kim Myles says authorities received a report shortly before 9 p.m. Sunday about someone on the Red Line tracks near the Granville station on the city's North Side.
Myles said service on the Red Line was halted for about half an hour while the person was removed.
She said the person was not struck by a train and did not make contact with the third rail.
Chicago Fire Department spokesman Will Knight says the person was taken to Weiss Memorial Hospital with minor injuries.