Authorities say a small airplane crashed in a field near Keystone Lake west of Sand Springs.
The Oklahoma Highway Patrol says the small plane went down in an area east of Westport and north of Bears Glen at about 9:30 a.m.
Firefighters from the Peninsula Fire Department responded to the crash scene.
Troopers said the plane's 57-year-old pilot was taken to a Tulsa hospital to be treated for a head injury. The OHP says it appears the plane experienced mechanical problems and the pilot was forced to bring the plane down in the field.
They said the nose of the single engine plane was destroyed.
The FAA is en route to the scene to investigate.