Officers responded around 9 p.m. Thursday to a shooting along the northbound lanes of the highway near the Academy Road exit in the Torresdale section of Philadelphia.
Pennsylvania State Police say they received a report of a woman who had shot herself while inside a moving vehicle.
Police found the female victim suffering from a gunshot wound to her head. She was pronounced dead at the scene.
There were reports that the fatal shooting was being investigated as a homicide, however, in a news release sent to Action News Friday afternoon, state police say it appears to be self-inflicted.
Chopper 6 was overhead as officers removed a gun from a white vehicle parked on the shoulder of the road.
The investigation is ongoing. Anyone with information on this case is asked to call police.