Updated at 7:10 a.m.

       Metro said service has been restored on the Blue and Silver lines after an early problem with a signal. There may be some lingering delays.

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       Original story at 6:10 a.m.

       Metro trains are not running Wednesday morning on part of the rail system’s Blue and Silver lines.

       Officials said there is a signal problem at the Largo stop. The delays are in both directions of the lines, and it’s not immediately clear how long the delays will last.

       Trains are not running between the Largo and Morgan Boulevard stations.

       Shuttle bus service is being set up to get passengers around the delays.