JOHNSTON COUNTY, Okla. (KTEN) — A Coalgate woman died Tuesday morning after her van crashed into the back of an 18-wheeler south of Wapanucka.

The Oklahoma Highway Patrol said the big rig had stopped on State Highway 48 to make a left-hand turn when a southbound vehicle driven by 51-year-old Shanelle Watts hit it from behind at around 6:30 a.m.

Watts was trapped in the wreckage for about an hour. She was pronounced dead at the scene.

The truck driver was treated for a head injury and later released from a Durant hospital.  

OHP said the cause of the fatal crash is under investigation.