One person was killed in a car accident Thursday morning in Prescott. Police responded to the single-vehicle accident at the intersection of White Spar Road and Cheery Street at around 1:16 a.m. Investigators say a 2015 Nissan Altima was traveling southbound on White Spar Road when the driver lost control and hit a retaining wall. The driver, a 31-year-old Prescott Valley resident, was ejected from the car and was pronounced dead at the scene. A passenger, a 25-year-olld Prescott Valley resident, sustained serious, but not life-threatening injuries. He was treated on the scene and then airlifted to a Phoenix area hospital for further care. Traffic on White Spar Road was detoured for several hours so police could investigate the scene and crews can clean the area. Police say speed appears to be a factor, but the accident remains under investigation. If you saw the accident, contact Prescott Police at (928) 777-1943.