For the second time in four days Harrisburg firefighters battled a working house fire in the south end of the city. Shortly before 1400 hours Box 1-5 toned for a reported house fire at 1265 S. 13th Street. Squad 8, Wagon 4, Towers 1,3, and Captain 3 (Enterline) responded on the initial alarm. Squad 8 arrived on location with heavy fire from a 2 story, brick, duplex. Command requested the balance of the first alarm to the scene. Two lines were stretched on a well involved first floor that was blowing fire from the front and rear of the structure. An aggressive interior attack knocked down the bulk of the fire in about 10 minutes and contained the fire to 1265 S. 13th Street with minor extension to the exposure.