Jewellery was stolen from a home in Little Fransham, between Dereham and Swaffham, during daylight hours yesterday.
Police said a window was damaged as the thieves gained entry to the property on Main Road between 9.10am and 4pm on Thursday February 28.
Officers want to speak to anyone who may have noticed anything suspicious in the area yesterday, or anyone with information about this burglary.
Contact DC Claire Fox at Thetford CID on 101 or Crimestoppers anonymously on 0800 555 111.
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