Firefighters with Beaumont Fire-Rescue were called to the U.S. Attorney's Office building on Magnolia Street around noon Friday after smoke began coming from the basement.
The building was evacuated while crews worked to determine the source of the fire.
A fire marshal on the scene told 12News at 12:15 p.m. that the smoke was coming from a small fire in an underground utility box in an isolated part of the building. Entergy assisted as the fire was put out.
As of 12:25 p.m. power remained shut off at the building.
No injuries were reported.