(AP) — Authorities say speed was a factor in a fatal crash in southwest Nebraska.

Chase County Sheriff Kevin Mueller says 18-year-old Christopher Kirby, of Benkelman, was killed Friday in a single-vehicle rollover crash on a highway near Enders.

Kirby was driving the vehicle when it went off the right shoulder. Mueller says Kirby overcorrected and lost control of the car. It rolled several times.

Kirby was not wearing a seat belt and was thrown from the vehicle. He was pronounced dead at the scene.