A prison officer has been arrested on suspicion of attempting to smuggle drugs into Maghaberry Prison, police say.
The 23-year-old man was detained on Friday morning at the prison on suspicion of conveyancing prohibited articles into a prison, misconduct in public office, possession of criminal property and being concerned in the supply of Class A and B drugs, as well as prescription medication.
He was taken to Musgrave Police Station for questioning.
Two women, aged 55 and 26, were arrested on suspicion of conspiracy to convey prohibited articles into a prison, possession with intent to supply Class A & B drugs and possession of Class A & B drugs.
They were detained after searches of properties in Lisburn and Dungannon.
A quantity of drugs and associated paraphernalia was also recovered during the operation.
Detective Chief Inspector Brian Foster, from the PSNI’s Criminal Investigation Branch, said: “During the searches in HMP Maghaberry and in the Lisburn and Dungannon areas today, detectives seized a quantity of suspected Class A and Class B controlled drugs and drugs paraphernalia."
Head of the Northern Ireland Prison Service, Ronnie Armour, said: “Removing dangerous drugs from Maghaberry will help to keep staff and prisoners safe. I would commend everyone involved in this operation.”