Detectives are questioning a 34-year-old man after cocaine with an estimated street value of £300,000 was seized.
Officers from the PSNI Organised Crime Branch are holding him on suspicion of conspiracy to supply Class A drugs.
He was arrested in the Lisburn area.
The PSNI said the suspect was later charged with five counts of conspiracy to supply Class A drugs.
He will appear before magistrates in Lisburn on Monday.