A Hazmat response was called for an extra-alarm fire early Monday in the Northwest Side Irving Park neighborhood.
Firefighters responded to a fire at a business on the 2900 block of West Irving Park Road shortly after 3 a.m.
A HazMat team was later called in, according to fire officials.
Officials said the fire was under control by about 4:45 a.m., but crews remained on the scene.
No injuries were reported as of 5 a.m.