Members of the public were urged to dial 999 if they saw escaped convict Matthew McKeown.
The 30-year-old absconded from HMP Springhill, a men's open prison near Aylesbury, on Friday.
Mark Weatherstone of Thames Valley Police said: “We are appealing for the help of the public to trace McKeown.
“If you see him, do not approach him and call 999 instead.
“If you have any information as to where he may be, you can call 101 or make a report online, quoting 43220414900."
No information was given about the sentence McKeown was serving.
Police said the escapee was 5ft 8ins, of medium build and has tattoos on his arms and left hand.
He has links to Coventry.
Information about his whereabouts can be given anonymously, via Crimestoppers, by calling 0800 555 111.
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This story was written by Tom Seaward. He joined the team in 2021 as Oxfordshire's court and crime reporter.
To get in touch with him email: Tom.Seaward@newsquest.co.uk
Follow him on Twitter: @t_seaward
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