The prison service has seized a substantial number of phones, weapons and drugs following a general search at Wheatfield Prison.
Twenty-four phones, including iPhone chargers and accessories were first discovered on a landing and some hidden in light fittings.
The prison was then locked down as officers from the Operational Support Group along with the canine unit carried out a wider search.
Another 13 phones were recovered along with tablets, cannabis and other drugs packaged in dealer portions and for internal concealment.
Five weapons, blades, shivs and homemade knives were also discovered.
The Prison Service said the seizure is the result of intelligence sharing and engagement with gardaí.
The garda operation 'Throwover' targets drug dealers smuggling, throwing or flying by drone, drugs into the prisons.
So far over 70 people have been arrested as part of the operation.
The Prison Service also said it has increased searches and prison patrols both on a random and intelligence-led basis.
