Police are urging Cumbrian farmers to keep their fertiliser secure so that it doesn't fall into the hands of terrorists.

Cumbria Police Counter Terrorism Branch sent out the reminder to farmers as we approach the time of year when they will be sowing fertiliser.

The branch urged farmers: "Keep your fertiliser secure and out of sight. Fertilisers containing Urea, Ammonium Nitrate, and CAN have all been used by terrorists. Please keep these fertilisers securely on your farm."

The police urged farmers to carry out regular stock checks and report anything missing to the police immediately on 101.

Farmers were also cautioned not to leave fertiliser in a field overnight and never leave it in a field for a long period of time.

"Wherever possible keep in a secure area such as a building or sheeted away from public view," a police spokesman said.

Police said farmers should use a Fertiliser Industry Assurance Scheme approved supplier wherever possible.

The force also reminded people that it is illegal to sell ammonium nitrate without the correct documentation.