Firefighters are battling a massive three alarm fire in Tarentum.
Crews were called to the scene of a house fire on Lock St. just after 2:00 p.m.
Thick grey smoke could be seen for mile around as crews tried to put out the flames.
The fire has spread to two homes on Lock St.
Crews have been told to evacuate the building.
It is unknown is there was anyone within the home when the fire started.
There have been no reported injuries.
This is a developing story.
