On the next day, in a speech before the UN-backed Conference on Disarmament, the minister accused Pyongyang of using the internationally banned VX nerve agent to carry out the assassination. He claimed that North Korea produced and stockpiled various chemical weapons and proposed stripping the state of its UN membership
The North's propaganda website, Uriminzokkiri, attacked Yun over his speech, dubbing it "psychotic slander."
"It is a groundless slander and fabrication. Those who are plotting biochemical warfare and posing biochemical weapons threats on us is none other than the US and the South Korean puppet regime," the website wrote.
"[South Korea] may be forced to pay its price and Yun Byung-se and its conservative puppet group will see its fate doomed soon."
According to local police, swabs of Kim's face revealed traces of VX nerve agent, which is classed as a weapon of mass destruction.
After North Korean Ambassador to Malaysia Kang Chol said that North Korea "couldn't trust" the investigation and refused to apologize for this and other inflammatory statements, Malaysia declared the diplomat persona non grata and gave him 48 hours to leave the country.
"I think we have given a clear message to the North Korean government that we are serious about solving this problem and we do not want [the investigation] to be manipulated,'' Deputy Prime Minister Ahmad Zahid Hamidi was quoted as saying Sunday by Malaysian national news agency Bernama.
Pyongyang has denied any role in the assassination and denies stockpiling chemical weapons.
