The Louth Rural Neighbourhood Policing Team is appealing for information following a fuel theft in Tetney overnight (April 25-26).
A digger on farm land on Grainsby Lane was targeted, and fuel was taken from the vehicle.
The culprits forced the fuel cap open and pumped the fuel from the tank while the vehicle was in situ.
If you are aware of anyone who is using red diesel, or is trying to sell such fuel, police officers would like to hear from you.
If you have seen or heard anything which could police, contact Lincolnshire Police on 101 quoting incident 48 of April 26.