11:08 a.m. Update: Metro says the delays have been cleared.
10:44 a.m. Update: Metro says the situation at Union Station has been resolved, too. However, the delays continue.
What are you experiencing on the Red Line? Post a comment below.
10:33 a.m. Update: Delays continue due to the Friendship Heights train malfunction, which Metro says has been resolved. And a new problem has occurred at Union Station where Metro says a sick customer is aboard a train. That is causing delays in both directions on the Red Line as well. Trains are single-tracking between the New York Avenue and Judiciary Square stations.
Original post: A train malfunction at Friendship Heights is causing delays on the Red Line. Trains are single-tracking between Friendship Heights and Van Ness-UDC stations, Metro said.