Wilkinsburg firefighters responding early Wednesday evening for a reported structure fire found a 3 story frame occupied house with heavy fire on the 2nd and 3rd floors. The fire extended into the exposure on side 4, also a 3 story occupied frame,and caused minor damage to the exposure on side 2. Both exposures were located only a few feet away. The fire was knocked down with a deck gun and several 1 3/4 handlines were used to extinguish the fire. 3 engines and a ladder truck responded to this fire. No injuries were reported and the Red Cross is assisting the displaced residents. The cause of the fire is being investigated by the Allegheny County Fire Marshalls office.