Cash and jewellery were stolen in a smash-and-grab break-in at a house in Pinchbeck on Wednesday.
Police believe a thief or thieves got into the house in Northgate by smashing a window with a brick before taking the items some time before 5.30pm.
Anyone with information should call DC Paul Gurney on 101, quoting incident number 281 of March 20, or Crimestoppers in confidence on 0800 555 111.