It is not clear what led to the disruption, but the transit service said crews were working to restore service.

Just before 9 a.m., Red Line trains were standing near the station at 1118 W. Argyle St. after a man was shot, officials said ...

CHICAGO - A woman shot a man on a CTA Red Line train Wednesday morning, prompting major delays on Chicago's North Side.

Red Line trains were delayed on the North Side Wednesday morning. According to the CTA just after 8:50 a.m., all Red Line ...

Red Line CTA trains were at a standstill Tuesday after a man was shot in Chicago's Uptown neighborhood, officials said.

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Red Line trains are delayed on the North Side Wednesday morning. According to the CTA just after 8:50 a.m., all Red Line trains are standing at the Argyle station due to police activity.

CHICAGO (WLS) -- The CTA Red Line was halted due to police activity on the city's North Side. Red Line trains were standing at 9 a.m. near Argyle and Broadway due to police activity, according to the ...

A shooting on Chicago's Red Line caused delays after a man was shot in the arm; a suspect was arrested and a firearm ...

Police activity at a North Side CTA station prompted major delays on the Red Line Wednesday morning.The CTA reported that Red ...

A shooting on a CTA Red Line train that left a man wounded Wednesday morning led to massive delays as concerns over safety ...