SEQUOYAH COUNTY, Oklahoma - The Oklahoma Highway Patrol says a Stilwell man has died after being thrown from his car in a crash in Sequoyah County Sunday night.

Troopers say Ronald Sinclair, 47, was southbound on Highway 59 about four miles north of Sallisaw when his 1999 Hyundai left the road, went airborne and rolled twice. 

The OHP says Sinclair was not wearing a seat belt. A medical helicopter flew him to a Tulsa hospital.  Troopers said he was pronounced dead early Monday.

Troopers are still investigating the cause of the crash.