CHICAGO (CBS) — Signal problems near Union Station caused significant delays for Metra BNSF Railway line trains during the Thursday morning rush.

Inbound and outbound BNSF trains were halted near Union Station at 7:45 a.m. due to a signal problem.

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Trains began moving again a short time later, but Metra said they were being “talked through to proceed safely into the station.”

As a result, delays were expected to stack up Thursday morning.

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According to Metra’s website, BNSF Railway line trains were experiencing delays of up to 41 minutes.

Amtrak, which owns Union Station, said the signal problems ere the result of a “brief loss of commercial power feed from ComEd,” but said the problem lasted only for about 10 minutes, and has been fixed.

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Amtrak expected the Metra delays would be resolved “pretty quickly.”