Police are urging business owners in the areas surrounding Exeter to be vigilant and step up their security measures following an ongoing spate of late night burglaries.
Since August, several business units at industrial estates and business parks have been broken into.
It is thought they have been targeted for their safe. Often, substantial damage has been caused.
Most recently, at the end of September, Exmouth Recycling Centre was targeted on two occasions for scrap metal and its safe. Substantial damage was caused to gain entry into the premise.
A safe and its contents were also stolen recently from a unit on the Kingsmill Industrial Estate at Willand near Tiverton.
Throughout the first week of August, units at Exeter Airport, Hill Barton Business Park and Willand Industrial Estate were all been broken into.
Over the last few weeks there have been further offences committed at premises on Lords Meadow Industrial Estate in Crediton, Finnimore Industrial Estate in Ottery St Mary and a further two offences at Cullompton's Bowling Club and Cullompton Football Club where items were stolen from one location and used to break in and steal the safe at the other.
At times stolen vehicles and fork lift trucks have been used in the offences.
The raids have occurred in the early hours of the morning and police are appealing to anyone with any information to contact them.
Detective Sergeant Jim Tarr, said: "All the incidents have involved business premises, sometimes with several offences on the same night.
"We are pursuing investigative leads linking these incidents having looked at a methods of the crimes such as the way access has been gained and vehicles used.
"Investigations are ongoing but we believe the burglaries have been conducted by a group of criminals that police are aware of."
Anyone who may have any information regarding the above incidents are urged to contact police on 101 or anonymously via Crimestoppers on, 0800 555111.
More information about the Community Messaging Service can be found by phoning 101 or visiting, www.devon-cornwall.police.uk.