Police said an operation in Tsuen Wan on the evening of 13 October recovered about 5.7kg of suspected cannabis flowers, with an estimated market value of about HK$1.1 million.
Officers first found about half a kilogram in a paper bag carried by a 28-year-old local man they stopped in an industrial building. They then searched a nearby mini-storage unit and found about five kilograms more.
The man was arrested on suspicion of trafficking dangerous drugs and was being detained for investigation.