FELTON, Pa. — State police have opened an involuntary manslaughter investigation after a woman riding in a car on a rural Pennsylvania road was killed by a stray bullet.

Police in York County say 55-year-old Nancy Folcomer of Red Lion was in a car in North Hopewell Township when she was hit by the .9 mm round shortly after 3:30 p.m. Saturday. She was pronounced dead less than an hour later.

Authorities said responding police found that a 42-year-old man and a 21-year-old man had been shooting a pistol on private property nearby. Their names weren’t released.

An autopsy was scheduled Tuesday to determine the cause and manner of death.