Officers are taking to the skies to spot people with a thermal imaging after break-ins in the Chalfonts.
Homes which back onto railway lines are particularly at risk, they warned.
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Meanwhile, police are searching for burglars who got into a High Wycombe house – when the front door was left over.
The Chalfonts break-ins were happening between midnight and 3am said Sgt Simon West.
Raiders cut chain link fences to break into greenhouses and sheds, he said.
