A police car was cut open by firefighters after it collided with a Peugeot 106 in Hemel Hempstead on Saturday.
The incident in Marlowes saw one female police officer and a female Special Constable taken to Watford General Hospital, the former with head and neck injuries which were not thought to be serious.
The panda, a Vauxhall Astra, was on its way to another incident in the town when the crash happened just in front of the West Herts College campus, causing the male driver of the other car to also be hospitalised.
Two crews from the Queensway fire station removed the roof of the police car using specialist Lukas cutting equipment, after fears were raised about the nature of the officers’ injuries.
Two ambulances, a rapid response vehicle and ambulance officer were also sent to the scene.
Police spokesman Giles Cooper said: “The exact cause of the collision is not yet known and we are unable to comment any further at this time.
“Anyone with information is asked to contact Sgt Chris Kent on 101 quoting ISR 319 of April 19.”
The incident, which happened at around 12.45pm, was dealt with by shortly after 2pm.