BBC World Service
A daily digest of news and features presented by Dan Damon.
Malaysian police have identified the chemical that killed Kim Jong-Nam - the half-brother of the North Korean leader, Kim Jong-Un - as the nerve agent VX. North Korea is suspected of being behind the attack, which was carried out by two women at Kuala Lumpur International Airport. Alastair Hay is emeritus professor of toxicology at Leeds University in the UK. (Photo: Kim Jong-Nam, brother of the North Korean leader Kim Jong-Un, who was killed last week in Malaysia Credit:TOSHIFUMI KITAMURA/AFP/Getty Images)