Experts have said North Korea has up to 5,000 tonnes of chemical weapons stockpiled, including a supply of VX, causing much concern among the global community.
Autopsy results from Kim's body showed he had died within about 15 to 20 minutes after the attack, Malaysia's Health Minister Dr Subramaniam Sathasivam said Sunday. Countries like Russian Federation started synthesizing a slew of other chemically similar "V series" nerve agents, including VR, VE, and so forth. No areas were cordoned off, and protective measures were not taken.
"The point being that not only do they have one type of weapons of mass destruction, which are nuclear, but they also have a second type, which is the chemical", Zilinskas said.
The sweep will be conducted from 1 a.m. on February 26 (1700 GMT on February 25), the police said. Senior police official Abdul Samah Mat, who is handling the investigation, did not specify what authorities found there, but said the items were being tested for traces of chemicals. He said the budget terminal is "free from any form of contamination of hazardous material" and declared it a "safe zone".
All carried diplomatic passports issued by North Korea, making it easy for them to arrive in Malaysia.
There is speculation that a binary version of VX was used to kill Kim, with each woman separately applying a non-fatal element of the nerve agent on his face.
The nerve agent is banned under the Chemical Weapons Convention, an worldwide treaty which North Korea never signed.
Kim was not an obvious political threat to his estranged half brother, Kim Jong Un. North Korea has denied any role in the attack.
On Saturday, Malaysia's tone changed.
Police said Friday the airport would be decontaminated.
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South Korea's intelligence agency believes that four of the North Korean men suspected of involvement in the death of Kim Jong-nam are spies.
Siti Aisyah and Doan Thi Huong are among four people arrested in Kim's death.
He said the nerve agent was hard for immigration or customs officers to detect in small amounts.
The Indonesian suspect, 25-year-old Aishah, told the Indonesian deputy ambassador to Malaysia that she believed she was taking part in a prank when she rubbed the substance on Kim's face.
Aisyah has now named the two men involved as "James" and "Chan" and claimed they looked Korean or Japanese, according to local paper the Star. She said she received some 400 ringgit ($90) for it. "She studied at the Pyongyang Music and Dance University", said the source.
Known by its U.S. Army code name, it is a clear, colorless liquid with the consistency of motor oil. It can be inhaled, swallowed or absorbed through the skin.
A victim exposed to a large dose of VX may also experience convulsions, loss of consciousness, paralysis or respiratory failure possibly leading to death.
Mr Kim died two weeks ago after two women accosted him in a check-in hall at the airport.
Pyongyang is calling for the immediate release of the pair, describing them as "innocent women".