POLICE have warned householders to be on their guard after seeing a slight increase in reports of theft relating to domestic heating oil and diesel fuel.

Devon and Cornwall Police say although they historically see a rise in these type of offences over the winter months, this in combination with a recent increase in fuel prices may contribute to this trend and may be an indication of a potential increase in offences over the next few weeks.

They say many Most offences occur in rural areas, but several offences have been reported in an urban setting and in commercial premises where significant quantities of bulk fuel have been stolen. Thefts are often committed overnight, against unprotected tanks and offences often remain unnoticed for some time.

One homeowner reported that all their oil had disappeared and there were signs that the lid on their tank had been tampered with.

Posting on Facebook Aly New said: "We just found ourselves with an empty tank this morning, no heating in the house this morning, even though we topped up 1000 litres three months ago.

"The guy from Blue flame advised the lid looked tampered with and either the oil was stolen or we may have an undetected leak. I find it weird to have something like this happening in Cornwall."

There are also reports that heating oil was stolen from St Agnes School and and 3,000 litres was stolen from Kea School.

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Police say fuel theft can be reduced with simple crime prevention measures.

Devon and Cornwall police rural affairs team is encouraging businesses and members of the public to be vigilant, reporting any suspicious activity to the police, noting descriptions and an accurate location. They should take the following precautions:

• Landowners where possible, should secure gates and block unused entrances.

• Protect heating oil and fuel tanks with locks, lighting, CCTV and fencing.

• Store machinery, vehicles and fuel containers out of sight where possible.

• Consider the use of signage or other means to prevent cold callers to homes, farms and businesses.

• Keep a regular inventory of quantities, so thefts can be identified promptly.

• Notify the police using 999 if you suspect an offence is being committed.

• If you have any information regarding fuel theft please email 101@dc.police.uk, call the non-emergency number, 101 or Crimestoppers on 0800 555 111.