Eight people have been arrested on suspicion of dealing heroin in Portadown.
Seven men aged 52, 39, 36, 31, 30 and two aged 29, along with a 22-year-old woman were held following police raids in the Co Armagh town on Monday.
Later A 45-year-old man was arrested under the Misuse of Drugs Act.
They have been taken to a Belfast police station for questioning.
Great work by the PSNI this morning in the fight against drugs. Large scale operation in Armagh and Craigavon with 8 arrests too date.— Cllr Carla Lockhart (@carlalockhart) February 29, 2016
Detective Inspector Keith Gawley said: “The suspects were all arrested this morning and searches have been conducted at a number of addresses in the Portadown area.
"They have all been taken to Musgrave Police Station for questioning on suspicion of supplying a class A controlled drug, possession of a class A controlled drug and possessing a class A controlled drug with intent to supply and are currently in custody assisting police with their enquiries.
“This operation is yet another example of our determination to reduce the availability of this killer drug and I appeal to anyone who has any concerns or information about illegal drugs to contact their local Police on the non-emergency number 101. Or, if someone would prefer to provide information without giving their details they can contact the independent charity Crimestoppers and speak to them anonymously on 0800 555 111."