(KMOV.com) -- Fire crews were called to a blaze around midnight in south St. Louis.
The first alarm fire occurred at a warehouse in the 5200 block of south 38th Street.
The fire was quickly maintained by the sprinkler system.
The inside of the warehouse sustained heavy smoke damage.
No injuries were reported.
It was not clear if the building was abandoned.
Authorities are working to determine the cause of the fire.