An anonymous reader writes: Malaysian police have announced their finding that Kim Jong Nam, half-brother of North Korean leader Kim Jon Un, was killed by assassins using VX nerve gas in an attack in the busy Kuala Lumpur airport. Malaysian authorities plan to decontaminate the airport and other sites visited by the attackers. Police are holding the two female attackers, one of whom was affected by the chemical agent, as well as two other men. They are seeking seven more North Koreans connected to the case. VX is the most toxic of the nerve gasses and the UN has declared it a weapon of mass destruction. The manufacture and stockpiling of more than 100 grams of VX per year is prohibited by the Chemical Weapons Convention of 1993. It has no commercial uses. The Malaysian police are trying to discover if it was smuggled into their country, or manufactured there. The Malaysian government has recalled its ambassador to North Korea for consultation. North Korea is blaming the death of Kim Jong Nam on Malaysia. North Korea is believed to have major stockpiles of chemical weapons, and is alleged to conduct experiments on prisoners and social undesirables.