Australian police and prison officials are investigating claims two inmates are secretly breaking out of prison, committing crimes - and then breaking back in undetected.
The inquiry was launched after two armed men wearing prison greens stormed a Domino's pizza outlet forcing staff to the ground before raiding the cash register and fleeing with a small amount of money.
A white Toyota HiLux 4WD matching the description of their escape vehicle was found abandoned hours later near a minimum security centre for men aged between 18 and 25 years.
The vehicle had been stolen, fuelling fears the inmates had broken out of - and back into - jail a number of times.
A corrections department spokesman confirmed an investigation was under way but didn't comment on the bizarre events.
A police statement said investigations were under way into a robbery at Kelso and an "alleged incident" at Oberon jail.
Parliament Member Paul Toole said it wasn't clear how many alleged break-outs had taken place at the centre.
"Any break-out is a serious matter and it is certainly being thoroughly investigated. Whether it was a joy ride, a dare, we don't know."
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