CHICAGO (CBS) -- CTA Red and Purple trains were disrupted for hours Monday afternoon after a fire broke out on the tracks near the Addison stop.

The Chicago Transit Authority said after the fire, the Red Line was suspended between Howard and Belmont – while the Purple Line toward the Loop was not running at all.

Trains were back to normal movement by 6 p.m., according to the Office of Emergency Management and Communications.

Images from social media showed flames on the tracks and a plume of black smoke rising up. In one photo, a southbound train was passing right past the fire on the northbound side, just north of the Addison Street stop and near Wrigley Field.

The CTA called the fire "minor."

As seen in video from Chopper 2, the fire was out by 3:30 p.m. – but personnel remained on the tracks.

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