FORT WAYNE, Ind. (WOWO): Fire crews are still looking for the cause of a house fire along Lake Avenue. It sparked Thursday afternoon west of Lakeside Park. Crews arrived to find the back of the home engulfed. The flames were knocked down in about half-an-hour, but there was heavy damage to the home. One firefighter received minor injuries and was taken to a hospital for observation. As of 5:00 P.M. Thursday, firefighters were still on scene to make sure all hotspots were extinguished.