Firefighters with the Pittsburgh Bureau of Fire responded to a 1-alarm residential structure fire on the 5600 block of 2nd Avenue in Hazelwood just after 7:30 a.m.

When they arrived on scene the fire appeared to be contained to a semi-detached house on the east end of three row houses. The intial call indicated that there may be children in the house.

Firefighters were able to very quickly able to determine that the occupants of the house were not inside. Firefighters had already ensured that the residents had been safely evacuated from the other two houses.

The fire was deemed to be under control before 8:15 a.m. The fire did not spread to the two other houses.

No residents or firefighters were hurt. Pittsburgh EMS and Police were also on scene.

The cause of the fire is under investigation.