The accident happened at about 11pm. The unmarked police car had reportedly been travelling along Pool Road towards the junction of Chiphouse Road and Pound Road when it was in collision with the rear of a Vauxhall car in which there were four people on their way home after a night out.
A number of police vehicles and paramedics were quickly on the scene but Shauna Sandrone and Stephanie Scutt, bar staff at the nearby Jolly Cobbler pub, were the first there, managing to open car doors and get the occupants out.
Zan Sparkes, one of the casualties, said: “All I was aware of was smoke, noise and people telling me to get out of the car.”
It is understood that one man was taken to A&E at Southmead Hospital for treatment and was allowed home the following day, while two others suffered cuts and bruising.
Jolly Cobbler landlord Mike Roper said that the crossroads were dangerous and this was the second serious incident at the junction in the 10 months since he had taken over the pub.
On Monday an Avon & Somerset police spokesman said: “A police car on an emergency call collided with another vehicle in Chiphouse Road, Kingswood. Three people in that car were injured. The police driver and his passenger were not hurt.
“The driver of the police car has been suspended from driving police vehicles, pending an investigation.”