UPDATE 7:20 P.M.:

Metro tweeted that the Red Line is no longer single-tracking, but residual delays continue in both directions.

UPDATE 6:26 P.M.:

A Metro spokesman said trains are single-tracking between Van Ness and Friendship Heights as officials check the report of an insulator fire unrelated to previous incidents today.

UPDATE, 5:59 P.M.:

Officials said the Red Line is no longer single-tracking, but residual delays remain.

UPDATE, 5:24 P.M.:

Trains are bypassing Dupont Circle and Woodley Park, and single-tracking between Farragut North and Van Ness.

UPDATE, 5:13 P.M.:

Trains are single-tracking between Dupont Circle and Van Ness, officials said, bypassing Woodley Park.

ORIGINAL STORY:

Red Line service was suspended Tuesday afternoon in part of Northwest Washington because of a track problem, officials said.

At about 4:50 p.m., officials said train service was suspended between the Van Ness and Dupont Circle stations because of a track problem between Dupont Circle and Woodley Park.

A Metro spokesman said the closure was related to a report of smoke or fire on the track. Crews were at the scene to investigate.

Trains are single-tracking between between Dupont Circle and Van Ness, officials said, bypassing Woodley Parkr more than an hour, from Friendship Heights and Van Ness stations, during the morning commute because of a reported insulator fire in a rail tunnel.

On Monday afternoon, no trains serviced the Orange, Blue and Silver lines between Foggy Bottom and McPherson Square for more than two hours after a person was fatally struck by a train at Farragut West. Metro officials said video showed the person intentionally entered the path of a train.