KANSAS CITY (AP) – Police say a 23-year-old woman has been thrown from the bed of a pickup truck after leaving a Kansas City Chiefs football game at Arrowhead Stadium.

Sgt. Bill Mahoney tells KCTV-TV Alexa Brosseit was hospitalized with serious injuries to her head and neck after the Sunday crash. He says a 22-year-old man was driving the truck with a woman in the passenger seat when he hit a guardrail on Interstate 435.

The impact ejected Brosseit from the vehicle. Her condition was unclear early Tuesday.

Mahoney says it’s unclear what caused the crash. The driver was arrested and released. Lab results from his blood alcohol content test are pending.