Riders on commuter trains in the D.C. area will face delays Thursday morning due to communication troubles, officials said.

       The delays are on the Virginia Railway Express and MARC lines.

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       It is not immediately clear how long the delays will last.

       A CSX official said there was an issue with Verizon.

       Cindy Schild, a spokeswoman for CSX, said in an email, “Verizon experienced a broader telecommunications issue that affected our phones lines for about 30 minutes yesterday evening.” She said the issue has “been resolved.”