Catalytic converters were stolen from three vehicles in Haverhill on the same night.
Following the three thefts overnight between Tuesday, July 2 and the next morning police are appealing for information.
Two of the incidents took place in Arrendene Road, where the catalytic converters were stolen off a Ford Ranger parked on a driveway and a Citroen Relay van parked in the street.
The other theft took place in Wratting Road, where a Mitsubishi L200 Animal parked on a drive had its converter stolen.
Anyone with information about any of these crimes is asked to contact Suffolk Police on 101 or Crimestoppers anonymously on 0800 555111.