The stolen vehicle is a red Honda 420 quad bike worth £5000. It was taken from a farm at Leswalt.
Detective Constable Andy Santangeli said: “It appears that thieves have been busy on Thursday night/Friday morning in the Stranraer area. We want anyone who may have seen or heard anything suspicious to get in touch with us at Stranraer on the 101 number. We also want to hear from any farmers in the area who may have had unusual visitors to their farms over the past few weeks to get in touch. These thefts appear to be planned and it may be that the thieves have visited the farms on a previous occasion to check out the area.”