Three prisoners have been disciplined after visiting a pub and sneaking alcohol back into a Suffolk jail.
The Prison Service said on Friday that the inmates, from Hollesley Bay open prison in Woodbridge, were spotted in a pub by a local resident and the police were informed.
A spokesman for the service said the three men returned to the prison of their own accord where they were disciplined.
He said: "There was an incident on 27 October when three prisoners did go to the pub and bought carry-outs".
The spokesman added that the Prison Service was not aware of any other incidents at Hollesley Bay, but urged locals to contact police if they suspected similar "activity (was) going on".
Millionaire novelist Lord Archer was released from Hollesley Bay earlier this year after serving a sentence for perverting the course of justice.
Hollesley Bay open prison operates with more relaxed rules than traditional institutions and allows inmates home visits and encourages them to find work outside of the prison.
The aim is to prepare prisoners, who may have been sentenced to life, for their release.