Three gaming machines were smashed open by thieves who escaped from a pub with cash boxes.
They forced open the front door of the Acorn pub in Pingle Drive, Bicester, and even though the alarm went off, they stole the money from the machines.
It happened around 5.45am on Thursday and they are believed to have used a car, which was parked outside the pub beween 5.30am and 6am.
Anyone with information should call 101.
Alternatively, contact Crimestoppers anonymously on 0800 555 111 or online at www.crimestoppers-uk.org