Pittsburgh Fire responded to a rowhouse fire on 44th Street in Lawrenceville around 4:45 p.m.
The fire started in the second rowhouse of a four-house section on the 90 block of 44th Street. Flames spread to each adjoining unit.
The fire caused extensive damage to the first and second home, both of which were vacant. The third and fourth rowhouses, which were occupied, sustained some damage.
Firefighters contained the flames by 5:38 p.m.
No one was injured.
The Fire Investigation Unit, made up of investigators from Pittsburgh Fire and detectives from Pittsburgh Police, are investigating.
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.