STILWELL, Oklahoma - A Stilwell woman was killed in an auto accident on state highway 59 in Adair County Sunday morning.

According to the OHP report, 46-year-old Anthony James Smith was driving his 2004 Ford F-150 northbound on US 59 with Janice Sue Smith, 64, as his passenger.

Around 11 a.m. the truck left the roadway to the right for an unknown reason and struck a tree. The vehicle rolled 1/4 time and came to rest on the passenger side. Despite both being buckled in, Janice Smith was partially ejected out of the passenger window.

James Smith was transported to Stilwell Hospital by ambulance where he was treated and released. Janice Smith was pronounced dead at the scene.

Troopers are still investigating the cause of the crash.