THREE 4x4 vehicles were stolen in a five-day period in Vale of Belvoir villages.
It is believed thieves with a knowledge of how to bypass 4x4 security systems are operating in the area as no glass has been found at the scenes and keys were not taken.
Police are asking motorists to take extra precautions following the thefts between last Wednesday and Monday. Report suspicious bahaviour to police on 999 if a crime is in progress.