This post has been updated.
Metro riders faced delays on three of five train lines this morning.
Green line trains are single-tracking between Naylor Road and Southern Avenue due to a track problem outside Naylor Road. Delays are continuing in both directions.
Earlier this morning, there were delays on the Blue and Orange lines due to an earlier train malfunction at Metro Center. Additionally, the Blue line experienced delays in both directions due to a switch problem outside Largo. Metro reported that these delays have been cleared.
Red and Yellow lines were not affected.