>> A banned chemical weapon killed Kim Jong Nam. That's according to Malaysian police investigating his murder. Kim is the brother of North Korea's leader. Kim died after he was assaulted at Kuala Lumpur International Airport last week. Police on Friday saying that swabs from his face showed the presence of VX nerve agent, a highly toxic substance classified as a weapon of mass destruction by the US.
>> If the amount of the chemical brought in was small, it would be difficult for us to detect. The chemical is illegal and it is a chemical weapon. We're investigating how it entered the country.>> South Korean and US officials believe Kim's murder was an assassination orchestrated by North Korean agents.
His attack caught on an airport security footage released by Fuji TV. Two women seen struggling with the victim who later approached airport security for help. He died on the way to the hospital. VX nerve agent is tasteless and odorless and is outlawed under the chemical weapons convention. Experts say it can kill 15 minutes after the victim is exposed.
Malaysia is still on the hunt for the masterminds behind the murder. It's asked Interpol to put out an alert to help locate four North Korean suspects, who they believe have already returned to their country.