A 39-year-old woman was arrested at a Tsim Sha Tsui hotel on Monday after just over 12 kilos of the drug was found in two black plastic bags the day before by airport customs.
A further six kilos was found in another black plastic bag on Tuesday, leading to the arrest of a 35-year-old man.
The suspected drugs, which Customs believe came from Africa, have a street value of about HK$23 million.
The pair will appear in West Kowloon Magistrates’ Court on Thursday. They have each been charged with one count of trafficking in a dangerous drug.