Thieves syphoned fuel from an oil container in the back garden of a north Northumberland home.
Between 5pm on Thursday, March 3, and 9am on Saturday, March 15, thieves broke into the back garden of an address in High Hauxley and stole the fuel.
Officers are carrying out inquiries into the theft.
Police want to hear from anyone who saw anything or anyone seemingly suspicious in the village over the past few weeks.
Any witnesses should ring Northumbria Police on 101, ext 69191.