Two people were injured in a single-vehicle accident Thursday in Prescott. Prescott Police responded to the two-thousand of Williamson Valley Road at around 3:15 p.m. A 65-year-old Prescott woman and her 91-year-old passenger, also from Prescott, were in the vehicle when it left the road near Yakashba Drive. The vehicle rolled and came to a rest in a shallow ravine behind a retaining wall. The driver of the vehicle had non-life threatening injuries to her arms and face and was taken to Yavapai Regional Medical Center. However, the 91-year-old passenger suffered injuries to her head and back and was flown to a Phoenix-area hospital. Police say impairment was not a factor in the accident.