Police in the northern province of Cao Bang on Thursday arrested a man and a woman for smuggling more than one kilogram of methamphetamine in a box of snack cakes near the China border.

The 55-year-old man and his wife, 52, from Hanoi, said they planned to sell the drug in the capital and nearby provinces.

Vietnam has some of the world’s toughest drug laws. Those convicted of smuggling more than 600 grams of heroin or more than 2.5 kilograms of methamphetamine face the death penalty.

The production or sale of 100 grams of heroin or 300 grams of other illegal narcotics is also punishable by death.