A crash in Osage County killed four people, according to the Oklahoma Highway Patrol.

The passenger and driver of the first vehicle have been identified as 72-year-old Rita Nelson and 37-year-old Brandy Morgan. Both were pronounced dead at the scene.

The driver and passenger of the second vehicle have not been identified.

The collision occurred on Friday around 11:18 a.m. on Oklahoma State Highway 99, approximately 1 mile south of County Road 4151, approximately 6 miles north of the town of Pawhuska, OK in Osage County.

Law enforcement kept the road closed for about five hours on Friday while crews investigated the crash. The Highway reopened around 4:30 p.m.

Video taken by a viewer after the crash showed at least one of the vehicles in flames.

This is a developing story, refresh the page for updates.