The man now faces paying a bill of up to €50,000 after Brandenburg’s justice ministry had to pay for the immediate replacement of 600 locks in the prison, Bild newspaper reports.

A photograph of a key could provide enough information for a skilled locksmith to be able to replicate it, leading the prison to fear that keys could be smuggled through to the inmates.

The justice department received a tip off that the intern had shared a picture of the master key for the JVA Heidering prison at the end of February. “A large number of cells and corridor doors had to have their locks changed,” a spokesman told Bild.

Some twenty prison guards worked into the early hours of the following morning to ensure that all the locks were changed.

The prison is situated just outside the city boundaries of Berlin on the southwestern edge of the capital.

“The internship ended with immediate effect and the intern was issued with a ban on entering the building,” the spokesperson said.

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