Burglars stole jewellery from a house in Bourne after smashing a patio window to get inside.
Police say an alarm system was activated at 4pm yesterday (Thursday) at the house in West Road but “only for a few minutes”.
Last night, PCSO Jason Posnett said: “So far we know that an amount of jewellery has been taken.”
Police say the intruder broke through a side gate before smashing the patio window at the back of the house.
Anyone with information is asked to call Lincolnshire Police, quoting incident 286 of June 9.