23:53 Hrs. The structure assignment was sent to the 400 Blk of East First St. for a reported building fire with possible entrapment. Chief 7 and PD arrived to find heavy fire from the rear of a one story pizza shop. Engine 7's crew deployed handlines to attack the fire, while the crew from Tower 7 performed a primary search of the attached apartment building, no occupants were found. The fire was quickly contained to the rear of the structure with no extension into the main portion of the builidng. Engine 7-1 provided water supply from a nearby hydrant. The fire is under investigation by Borough Officials.