CHICAGO (CBS) — Signal problems disrupted CTA Pink Line service downtown Thursday morning.

Service was suspended about 4 a.m. between Polk and the Loop because of signal problems near the Ashland/Lake station, according to a service alert from the CTA.

Pink Line trains were operating between 54th/Cermak and Polk and then to Racine for direct connections to the Blue Line, the CTA said. Shuttle buses are available for customers in the affected area.

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