Police are investigating the attempted murder of an officer who was the victim of a hit-and-run while on duty.
He was taken to hospital with head injuries after being hit by the red Vauxhall Astra just after 3.15pm on Tuesday in Market Square, Aylesbury, Thames Valley Police said.
The driver did not stop after the crash and the car was then involved in a number of other collisions before it was abandoned in nearby Osier Way.
The driver and two passengers, all believed to be male, fled the scene, a force spokesman said.
The officer was discharged from hospital on Tuesday night. No-one was injured in the other crashes.
Investigating officer Detective Inspector James Mather said: “I am appealing to anyone who may have information about the incident to please contact police immediately.
“I would particularly like to speak to anyone who has mobile phone or dashcam footage of the incident or the vehicle being driven in the town to come forward.
“I would also like to hear from anyone who saw a vehicle matching the description being driven erratically in the town.
“Thankfully the officer is now recovering at home with support from his family and the force. This incident highlights the sacrifices that police officers and staff make every day to protect the public across the country.”
Anyone with information should call police on 101 quoting (13/2).