Detectives from Reactive and Organised Crime Branch have seized an estimated £300,000 worth of herbal cannabis in Newtownabbey.
The drugs were found during a search of commercial premises on Wednesday, March 2.
Police have not said exactly where in Newtownabbey the drugs were seized.
A 30-year-old man arrested in connection with the seizure has been taken to a Belfast police station for questioning.
Detective Inspector Sean Taylor said: “Officers have also searched properties in Randalstown and Ballymena and our enquiries are continuing. This is the latest in a series of unrelated drugs seizures this week, which brings the total value recovered since Monday to more than £1million.
“We are aware of the threat posed by illegal drugs and are determined to use every opportunity to take these substances off the streets and bring anyone involved in their sale, supply or distribution before the courts.”