Two police officers and a teenage girl were injured when a car crashed into two parked vehicles.
Police said a silver Ford Focus hit a stationary marked police car and a Toyota Prius in Norden Road, Maidenhead, at about 05:30 BST on Sunday.
The officers and teenage girl remain in hospital with serious but non-life-threatening injuries.
Two 24-year-old men have been arrested in connection with the crash.
Three other people were treated for minor injuries, the force said.