Two vehicles in Lakenheath had their wheels and a catalytic converter, altogether worth more than £5,000, stolen.
The incidents took place between 6pm on Tuesday, October 1, and 7.30am on Wednesday, October 2, at a nature reserve in Station Road.
A silver Toyota Hilux had all four wheels and its catalytic converter stolen, with a combined value of £5,000.
The second vehicle, a blue Volkswagen Lupo, had all four wheels taken, with a total value of more than £450.
Anyone who witnessed any suspicious activity in this area or who has any information is asked to contact PC Luke Heffer at Mildenhall Police Station on 101 or Crimestoppers anonymously on 0800 555 111.