CHICAGO (CBS) — Three tracks at Union Station have been closed during the Wednesday morning rush, due to falling concrete.

Metra said concourse tracks #2, #4, and #6 were closed until further notice due to emergency station repairs after concrete fell on the tracks.

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The closed tracks are expected to cause delays on the Heritage Corridor, SouthWest Service, and BNSF Railway lines.

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As of 7:15 a.m., Metra was reporting delays of up to 15 minutes.

Riders should check Metra’s website for updates.

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Amtrak owns the station, and is handling cleanup efforts, but did not immediately respond to requests for comment.