Catalytic converters were stolen from two vehicles parked on the Norwich Road industrial estate in Lowestoft.
The thefts happened between 6.30pm last Friday, February 7 and 8.30am on Saturday. It appears the converters were unscrewed from the two vans.
Officers are asking anyone who saw anything unusual in the area between these times to call PC 929 Durrant at Lowestoft police on 101, or Crimestoppers, anonymously if required, on 0800 555 111.
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