Thieves have broken into a Buckinghamshire prison and stolen £650 from a safe.
Thieves broke into Spring Hill open prison
The raiders smashed their way into Spring Hill open prison near Aylesbury.
A Prison Service spokeswoman said the thieves also escaped with mobile phones.
They also forced open many lockers containing the personal effects of inmates and stole valuables.
The spokeswoman said: "The safe contained £650 of prison money.
"This was used to give discharge grants to prisoners."
Police are investigating the raid, which happened over the weekend.