A white van rammed a police car on the A1 in Lincolnshire before driving off.
The incident involving a Ford Transit on the A1 at Marston was reported to the force at 12.30am on Wednesday, April 12.
Extensive damage was caused to the police car.
No officers were injured.
Police are investigating the incident and anyone with information should call 101, quoting incident 9 of April 12.