Ri Tong Il, North Korea’s former deputy ambassador to the United Nations, says Kim had a history of high blood pressure and suggests he could have died from a heart attack.

Ri insists that samples of the toxic substance allegedly used in the Feb 13 attack at the Kuala Lumpur International Airport 2 (klia2) be sent to the Organisation for the Prohibition of Chemical Weapons for testing.

Malaysia has said Jong Nam was killed with the super toxic nerve agent VX.

Two women, one a Vietnamese and another an Indonesian, have been charged with attacking him with the nerve agent at the airport.

Jong Nam, who was using a passport issued under the name Kim Chol, was waiting for a flight home to Macau at the time.

Tong Il said there were thousands of people at the airport but not a single passenger was contaminated or affected by the nerve agent.

“There were policemen and doctors who escorted the deceased to the hospital but none of them were affected by this very toxic material.”

He questioned how it was possible that the female suspect, who had applied the material directly to the man’s face, survived while the victim died.