An afternoon accident on I81 SB near MM50.5 snarled traffic for hours in both north and southbound lanes. Crews arrived to find two tractor trailers and two passenger cars involved. Fire Police closed Southbound at Exit 52. One truck was leaking diesel fuel but even with the damages there were no major injuries. Engine, Squad, and Traffic 33 were assisted by Union Fire Co, Carlisle Fire Rescue, and Carlisle Fire Police. Expect traffic delays for a couple hours.