THIEVES targeted a used van garage to steal catalytic converters.
The parts were stolen from four vehicles at Van Monster in Colchester Road, Frating on December 22 at around 12.55am.
The business has stepped up security since the thefts.
Anyone with information is asked to call PC Sarah Latchford at Harwich 101 or anonymously at Crimestoppers on 0800 555111.
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