Train service on the Green Line was restored between the Anacostia and L'Enfant Plaza Metro stations after a major gas leak was resolved just north of Nationals Park.
A high-pressure, 2-inch gas line leaked in the 1200 block of Half Street SE, the fire department said at about 1:30 p.m. The problem was resolved and roads reopened at about 3p.m.
Information on the cause of the leak was not immediately available.
No injuries were reported.
Several buildings were evacuated "in abundance of caution," the department said in a tweet.
Metro service on the Green Line was suspended between the Anacostia and L'Enfant Plaza stations. Shuttle buses were made available to riders, Metro said.
D.C. police asked drivers to avoid the area.