Four people were injured in a single-vehicle rollover crash Saturday afternoon in Joshua Tree. The vehicle was traveling westbound on Highway 62 when for unknown reasons, the 19-year-old female driver lost control near Copper Mountain Road and the vehicle left the highway and rolled over. Injured in the crash were the driver, an 18-year-old woman in the front seat, and two juveniles, a 13-year-old boy and a 14-year-old girl in the back seat. All four occupants were taken by Morongo Basin Ambulance to Desert Regional Medical Center in Palm Springs. The California Highway Patrol is investigating.