Residents are being urged to check the security of their fuel tanks following a spate of diesel thefts in Foulridge.
Watch liaison officer Keith Sandham said around three incidents have been reported between Friday and Tuesday.
The thefts have taken place at commercial premises, off Warehouse Lane, where HGV tanks have been targeted.
For information of how to fit preventative security devices visit www.personalalarms.com or www.redlinesecurity.co.uk
Anyone with information on the thefts can ring 101 or Crimestoppers on 0800 555 111.