Firefighters with the Pittsburgh Bureau of Fire responded for a 2-alarm residential structure fire in the 400 block of Beltzhoover Avenue just after 1:15 a.m.

Upon their arrival they found a fully involved fire at an unoccupied house that had spread to the house next door. Both houses were a total loss. Firefighters worked to save a third house. Four adults from the third house were displaced by the fire and are receiving assistance from the Red Cross. PLI was on scene to assess the structural integrity of the third house.

While still fighting the Beltzhoover fire, firefighters were called to Freeland Street and Estella Street a couple blocks away for a fully involved structure fire at an unoccupied house.

Several tall trees surrounding the home caught fire.The second fire was declared under control just before 3 a.m.

There were no injuries to firefighters at either fire. Both fires are believed to be suspicious in nature.

The Fire Investigation Unit was on scene to investigate.