Multiple Phoenix fire crews extinguished flames in a vacant commercial building on 44th Street between McDowell and Thomas roads early Friday morning, officials said.
The fire started outside the two-story building but extended into the interior, the Phoenix Fire Department said.
Firefighters were called to the scene just before 8 a.m. Large fans were used to blow smoke from the building, the department said.
The cause of the fire was still under investigation. No injuries were reported.