CHICAGO (CBS) — Red Line ‘L’ train service was disrupted early Tuesday afternoon, due to what the Chicago Transit Authority only called police activity at the Addison stop near Wrigley Field.

The CTA halted northbound Red Line trains in the early afternoon due to police activity near the station. The agency did not specify what exactly happened.

By 1:53 p.m., normal service had resumed, but minor delays continued.

The CTA advised riders to allow extra time.

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