On 13 February 2017, Kim Jong Nam, the half-brother of North Korean leader Kim Jong Un, was assassinated at Kuala Lumpur International Airport.

Just last week, the Malaysian police revealed in a post-mortem report that the cause of Kim Jong Nam's death was the extremely lethal chemical agent, ethyl S-2-Diisopropylaminoethyl methlyphosphonothiolate (otherwise known as VX nerve agent).

The nerve agent is odourless and tasteless, and can significantly affect the nervous system of the human body, even in small doses.

It has been categorised as a weapon of mass destruction by the United Nations. In addition, its use, apart from research, medical or pharmaceutical purposes, is prohibited under the United Nations' Chemical Weapons Convention.

Singapore is a Member State of the Chemical Weapons Convention and gives effect to it through the Chemical Weapons (Prohibition) Act (Cap. 37B).