A family of four that was not a home at the time of the fire is now safely accounted for. The American Red Cross is assisting them with temporary accommodations.
The cause of the fire is still under investigation.
Pittsburgh Bureau of Fire responded to the 200 block of Ater Way just before 7 p.m. for a 1-alarm residential structure fire in a duplex. The response quickly grew to 3 alarms.
Two adults and two pets exited one side of the duplex safely. An initial search by firefighters of the other side showed it to be unoccupied at the time of the fire.
One firefighter was transported to the hospital for difficulty breathing. A second firefighter was evaluated by an EMS physician on scene and released.
There were no other injuries.
The American Red Cross arrived to assist the displaced residents with temporary accommodations.
The Fire Investigation Unit will determine the cause of the fire.