A diamond and sapphire ring was stolen from a house in Princes Risborough.
Between 2pm and 8.30pm on Tuesday, June 23, the alleged thieves illegally entered a property in Manor Park Avenue where they took the jewellery.
The thieves entered the property via an insecure door whilst the victims were in the garden.
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Investigating officer P1746 Richard Tulloch of the Investigation Hub based at High Wycombe said: "We are appealing for anyone who may have witnessed the incident or who may have information to call our 24-hour enquiry centre on 101, quoting reference 43200189828.
“If you don’t want to speak directly to police you can contact the independent charity Crimestoppers anonymously on 0800 555 111.
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“No personal details are taken, information is not traced or recorded, and you will not go to court.
For more advice on how to keep your home safe, visit the Thames Valley Police website.
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