This morning Swatara Fire-Rescue and mutual aid were dispatched for reports of a building fire.  Swatara PD arrived to find a working fire on the second floor.  Fire was found in 2 units and the attic area.  Units brought the fire under control in less than 20 minutes with 3 attack lines. 50 residents were displaced and a temporary shelter was set up with the help of the Red Cross at Station 3.  Crews were out for approximately 3 hours before returning.