Detectives from PSNI Organised Crime Unit have arrested a 42-year-old man on suspicion of a number of drug-related offences.
Detective Inspector Chris Millar said: “The man was arrested on suspicion of offences, including fraudulently importing Class B controlled drugs.
“He is currently in custody assisting police with their enquiries.
“The arrest follows the significant seizure on Friday, March 30 of £1.3 million worth of herbal cannabis in the Dromore, Co Down area and was in collaboration with our partner agencies.”
The drugs were found concealed inside an industrial-sized fuel tank on a shipping pallet at a property in the Dromore area.
Police said their enquiries were continuing.