The building sustained minor damage from the fire.
San Antonio firefighters believe an electrical problem may have ignited a fire at a building just south of downtown late Saturday night.
It happened around 11:49 p.m. in the 3500 block of South Flores Street near Pleasanton Road.
The fire was contained to just one part of the building, SAFD says.
First responders were able to extinguish the flames quickly and prevent the fire from spreading.
Officials with SAFD say an electrical issue on a rooftop air conditioning unit may have caused the fire.
No injuries were reported. The building sustained only minor damage.
This is a developing story.