Detectives in Bodmin are dealing with an unprecedented number of house burglaries with 12 reported in the past four weeks.
The police have arrested a man suspected of committing six of the burglaries but the break-ins are continuing.
The man is currently on police bail pending further enquires.
A house in the Nanstallon area was the latest to be targeted during the day last Wednesday (March 5) where an I-pad, mobile phone and jewellery were stolen.
The latest theft follows a patten, where homes in rural areas around Bodmin have been burgled during the daytime and jewellery and computer equipment have been stolen.
Nanstallon, Kirland and Lanivet are among the communities where thieves have struck in recent weeks.
Police are appealing for any potential witnesses or anyone with any information that will lead to the identification of those responsible or alternatively the recovery of any of the stolen items.
Detective Sergeant Dave Jago said one of the recent victims was an elderly and vulnerable man, and officers are asking the public to provide them with the information they need to identify and apprehend those responsible.
“I would urge everyone to be on their guard and to review the security of their homes, garages, sheds and outbuildings,’’ said Mr Jago.
“ I would also encourage the public to protectively mark their property and where possible invest in security lighting or alarms.
Any information can be reported by either phoning 101 and leave a message for Detective Constable Parkman at Bodmin CID or alternatively anonymously via Crime Stoppers on 0800 555111.