Gardai have warned people to protect their oil tanks after a number of tanks were interfered with.
With the price of home-heating oil continuing to rise, Gardai have warned people to secure their tanks.
In recent days, there have been attempted robberies of fuel from oil tanks in both Milford and Letterkenny.
Gardai in Milford received a report of an attempt to steal oil from a tank at a house in The Pines in Churchill.
A 25 litre drum was found near the oil tank which Gardai believe was being used to steal oil.
Thieves in Letterkenny did steal more than 500 litres of oil from a tank at a house in Whitethorn Park on September 21st.
Garda Sgt Niall Maguire warned people to secure their tanks.
He said there are a number of ways to prevent thieves from targeting tanks including locks, alarms, thorn bushes and sensor lights.