A North Korean diplomat argued Kim Jong Nam, half-brother of dictator Kim Jong-Un, died of a heart attack, not by exposure to the deadly nerve agent VX, rejecting the findings of a Malaysian autopsy.
North Korea told Malaysia not to perform an autopsy, but officials did so anyway. This has sparked a diplomatic crisis between the two nations. Malaysia has recalled its ambassador and is no longer allowing North Koreans to enter the country without a visa.
Experts believe VX can only be produced in very sophisticated, state-run laboratories. But Ri Tong Il, former North Korean deputy ambassador to the United Nations, argued that since the women accused of killing Kim were not poisoned, they could not have used VX.
Malaysian officials harve argued the women, who said they thought they were playing a prank with baby oil, showed signs of being trained killers.
Many experts suspect Kim Jong-Un ordered the assassination in Malaysia's Kuala Lumpur International Airport.
Ri argued that Kim Jong Nam, who has long been overweight, suffered from heart problems. He said officials found medication for diabetes, heart problems and high blood pressure in Kim's belongings when he died.
North Korea has not even officially acknowledged that Kim Jong Nam is dead. It refers to the victim as Kim Chol, the name on Kim's passport. But Malaysia has confirmed it was Kim Jong Nam.
Meanwhile, South Korea's spy agency claims Kim Jong-Un ordered the assassination of his half-brother, once the heir to the country dictatorship.
Malaysia had arrested a North Korean man in connection with the murder, but said it would release him Friday, citing a lack of evidence. Four North Korean suspects are at large.
WATCH | Here's more background on Kim Jong Nam and his death.
The Associated Press contributed to this report.