WASHINGTON COUNTY, Oklahoma - Three are dead after the car they were in hit a center guardrail and flipped late Friday night. Two children are among those killed, according to the Oklahoma Highway Patrol.

Troopers say 27-year-old Brittany Dilley, a 2-year-old boy and 7-year-old girl were killed. A fourth person, 42-year-old Larry Sutton, was taken to the hospital with serious injuries.

Authorities say no one was using a seat belt, and investigators aren't sure who was behind the wheel of the 2000 Chevrolet Blazer when it overturned.

The wreck happened a little after 10:30 Friday night on southbound Highway 75 about two miles north of Copan in Washington County. A collision report states the vehicle hit the guardrail and rolled over it. People in the SUV were thrown as far as 30 feet away.

The wreck is still under investigation.

An account has been set up to help with funeral costs, a family member tells News On  6. It is at Chase Bank under the name of the girl that was killed. Her name is Aubrey Gorrell, and she lived in Tulsa, according to her grandfather.