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A joint intelligence-led operation has thwarted a drone-based smuggling attempt at the Arouca Maximum Security Prison between 7 pm on September 28 and 5.45 am on September 29.

A police media release sent on September 29 said three suspects were arrested about 50 metres from the prison wall, and a "substantial quantity" of contraband was seized, including narcotics, cigarettes, drone equipment, and communication devices.

The release said additional illicit items were also found during the co-ordinated searches of several prison cells.