Updated at 4.37pm: A 36-year-old woman and a 58-year-old man were arrested at Hong Kong International Airport on suspicion of trafficking six kilograms of 'ice', a government spokesman said on Tuesday. The seizure of the drugs, worth about $2.1 million, was the largest of its kind at the Chek Lap Kok airport for three years, the spokesman said. The two Hong Kong people were arrested while they were about to depart for New Zealand. The spokesman said police, customs and Aviation Security Company (AVSECO) had taken part in the operation. On Monday morning, AVSECO staff found six bags of 'ice', weighing about 3kg, in a specially designed vest worn by the woman. Police officers subsequently intercepted the man ? who was about to board the same flight as the woman. They found about 3kg of 'ice' on the man, concealed in similar fashion as on the woman. In follow-up searches, a small quantity of cocaine and cannabis, and some equipment for drug taking were found in the residence of the woman, the spokesman said. He said investigations were continuing on Tuesday afternoon. Customs has also notified New Zealand authorities to follow up the case. 'Ice' is a colloquial term for the drug amphetamine. It is used to suppress the appetite, control weight, and treat mental disorders. Chronic use of the addictive drug can lead to extreme exhaustion and malnutrition. Police are concerned about the rise in trafficking and use of drugs like ?ice?, ecstasy and cocaine in Hong Kong in recent years.