According to the Pennsylvania State Police, after 11:00pm, Monday night, the body of a man was found outside of his vehicle, along the northbound lanes Interstate 81 in Hanover Township.
Police say the body was located at mile marker 75.4.
The investigation suggests a road rage incident occurred involving multiple passenger vehicles and a tractor trailer.
Investigators believe there is no danger to the public.
Interstate 81 northbound was closed in the area of the incident while the investigation occurred.
Anyone with information is asked to contact the State Police in Harrisburg at (717) 671-7500.