A Metro train passes along the track. (The Washington Post 2011)

Updated at 7:35 a.m.

Normal service is back on Metro’s Blue and Yellow lines, the transit agency said.

Original post at 6:30 a.m.

Riders on Metro’s Blue and Yellow lines should expect delays Friday morning.

There was a problem with a broken down train at the Crystal City stop. The delays are in the direction of the Huntington and Franconia stations.

It is not clear how long the delays will last.