A security alert at Magilligan jail in Co Londonderry has now ended.
Magilligan prison had been closed to all domestic and legal visits on Friday due to a nearby security alert.
The PSNI said the Point Road, Limavady has been closed following a report of a suspicious object.
Inspector Ian Armour said prison staff had alerted them to the device.
The Army attended, and the device was declared to be “nothing untoward”.