Four visitors to Canberra's prison were denied entry to the jail following a police operation on Sunday.
The searches at the Alexander Maconochie Centre was a joint operation with ACT Policing and ACT Corrective Services, searching, visitors and cars coming into the prison.
An ACT police spokesman said searches were carried out over four hours on Sunday afternoon.
During the operation, officers searched 64 visitors and 39 vehicles entering the site.
Of those, four visitors were denied entry to the prison, although ACT police did not say why the visitors were barred from the site.
A further 134 breath-tests and 21 drug tests on drivers were also carried out in the operation.
One driver tested positive to methamphetamine, while two unregistered vehicles were identified.
One defect notice was also issued.
The search outside the prison comes weeks after the prison was sent into its first state of emergency after a hole was cut in the perimeter fence and contraband thrown into the prison.
The state of emergency triggered a lockdown at the site and prisoners were kept in their cells for 23 hours a day.
A number of contraband items were found by prison staff during the lockdown, including syringes, knives, needles, mobile phones, USBs and drug paraphernalia.
The lockdown lasted for almost a week.
A recent review of Canberra's prison listed 73 recommendations for the jail more and better-trained staff, upgrades to security and a need to raise education and training outcomes for prisoners.