An Afton woman was killed in a one-car accident Sunday morning.

 The Oklahoma Highway Patrol says the acciddent took place around 12:30 a.m., about one mile south of Wyandotte on Highway 10.

 44-year-old Lisa Hallbauer's 2011 Nissan Altima left the roadway to the right for an unknown reason, drove along an embankment, and struck a tree.

 Hallbauer was pronounced deceased at the scene.

 The investigation is ongoing.