Two crews from High Wycome attended alongside an officer.
Firefighters were called to three cars involved in a road traffic collision.
One male adult and one female adult were physically trapped in their vehicles and sustained injuries. Firefighters released both trapped adults.
One male adult and one female child were released prior to the arrival of the fire service and sustained minor injuries. All casualties were handed into the care of South Central Ambulance Service.
Thames Valley Police were also in attendance.