One man linked to 40 Lincolnshire burglaries
Police believe one man is responsible for nearly 40 burglaries carried out in Lincolnshire over the last four months.
Most of the victims, in Nettleham, Saxilby and Horncastle, were on holiday when their homes were targeted.
Police said they have established the burglar's methods, but are not releasing details as surveillance and intelligence work is ongoing.
The Lincolnshire force has released CCTV images of a man they want to trace in connection with the crimes.
They are also offering a reward of £1,000 for information leading to a conviction.
Eighteen homes in Nettleham have been burgled, 13 in Saxilby and six in Horncastle, with cash and jewellery stolen in most cases.
Detectives are carrying out extra patrols, as well as an "extensive covert surveillance operation" in a bid to catch the man they believe is responsible.
They "strongly suspect" he is from, or has very close links, to the South Yorkshire area.
Det Ch Insp Shaun West said: "This is an extremely positive step forward. The detailed work we have done around these images means we are very confident that this is our man. Although we can't go into details for operational reasons, we are also extremely confident that he lives in, or regularly visits the South Yorkshire area.
"We need people, especially in Lincolnshire and South Yorkshire, to study these images. Do you know anyone who has links to both areas?
"Do you know anyone who is trying to sell on relatively large quantities of jewellery? If you recognise this man then please call us as soon as possible and help us with our inquiries."
The CCTV images of the man police want to trace were taken by cameras in Horncastle town centre early on 15 August.