The fire was reported at about 6 a.m. at a plant located at Nacogdoches Road and Wurzbach Parkway.
Aerial footage showed several people were evacuated from the building; they stood in the parking lot as fire crews worked inside and outside the plant.
The San Antonio Fire Department reported the fire was out by 7:30 a.m. and crews were working to ventilate the building. An agency spokesperson said the fire may have started with the machinery; it was extinguished by the sprinkler system.
No one was hurt.
