Utah Highway Patrol officials are attempting to determine the cause of a head-on collision between a Provo Police Department vehicle and another car early Sunday.

Details are sketchy, but Provo Police dispatchers said a car driven by Officer Skylar Dimick collided head-on with a car driven by Scott Burke, 17, Orem.Though both Dimick and Judy Davis, a passenger in the police vehicle, were transported to and treated at Utah Valley Regional Medical Center, they were released Sunday morning. Burke and 15-year-old Danielle Train, Provo, were still in the hospital Monday morning.

The UHP is investigating the crash, since local law enforcement authorities were involved in the accident, dispatchers said.