Pittsburgh Firefighters responded to a 911 report of a structure fire around 11:30 a.m. on the 500 block of Alpine Avenue.
Arriving crews found flames and heavy smoke coming out of a third-floor window. It took about 20 minutes for firefighters to knock down the 2-alarm fire.
No injuries were reported. At least one residence is uninhabitable, with significant damage at the second and third floors.
The Fire Investigation Unit, which is comprised of Pittsburgh Fire investigators and Pittsburgh Police detectives, is investigating the cause of the fire.
Tonight, the City-County Building is illuminated to recognize Poison Prevention Week and the 50th Anniversary of "Mr. Yuk" in partnership with Children's Hospital of Pittsburgh of UPMC.
For questions about the lighting at the City-County Building, please reach out to the Office of the Mayor.