Kim Jong-nam killing: poison dose so high he died in '15 to 20 minutes'

Ministers believe half-brother of North Korean leader was killed with more than 10mg of UN classified VX nerve agentThe dose of poison given to North Korean ruler Kim Jong-un’s half-brother was so high it killed him “within 15 to 20 minutes”, Malaysia’s health minister has said. Kim Jong-nam died on 13 February at Kuala Lumpur airport from being poisoned with VX nerve agent, a banned chemical substance classified by the UN as a weapon of mass destruction.Related: Kim Jong