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Update, 11 p.m.:

Pepco reports about 1,300 customers remain without power Thursday night, down from about 5,000 earlier in the day.  Officials had no estimate on when all repairs would be completed.

Update, 6 p.m.:

11th Street NW has partially reopened, according to police.

Update, 5:05 p.m.: 

Two underground Pepco lines malfunctioned Thursday, shutting down traffic lights along a major Northwest commuter route and cutting off electricity to thousands in the Logan Circle area, officials said.

Evening commuters face delays on Rhode Island Avenue NW between 11th and North Capitol Street as D.C. police are directing traffic at powerless intersections. At least one accident happened at Rhode Island and New Jersey avenues, but no injuries were immediately reported.

The incident was sparked by the failure of at least two underground feeder lines near the intersection of 11th and P streets NW about 3:30 p.m., Pepco officials said. Crews responded to the scene and were trying to determine what caused the problem and to restore power, officials said.

Police and fire officials and received early reports of an underground fire in the P Street area, but those reports could not be immediately confirmed.

As temperatures rose into the 90s Pepco reported more than 5,000 customers without power. Officials could not estimate when power would be restored.

— Clarence Williams

Update, 4:53 p.m.:

Pepco’s site is reporting that more than 5,000 customers lack power in a stretch of D.C. from the National Mall up to Irving Street. This area includes Logan Circle, where the transformer issue was reported. Head to this live map for the latest outage numbers.

Original Post, 4:20 p.m.:

An issue involving a transformer near Logan Circle has shut down a stretch of 11th Street in Northwest Washington just before the afternoon rush gets underway.

The D.C. Police tweeted about the issue this afternoon:

Avoid the area around 11th Street between Rhode Island Avenue and O Street. The road is closed in both directions.