Malaysian Police said they will conduct a sweep of the terminal at Kuala Lumpur's International Airport, where North Korean leader Kim Jong Un's exiled half-brother Kim Jong Nam was killed, to check for possible traces of the toxic chemical suspected to have been used in the attack.
According to local media reports, the sweep will involve officers from the police's chemical, biological, radiological and nuclear teams, as well as the hazardous materials unit under the fire department and the atomic energy board.
VX is one of the deadliest chemical weapons created by man: just 10 milligrams of the nerve agent or a single drop is enough to kill in minutes.
Since the February 13 attack, tens of thousands of passengers have passed through Kuala Lumpur's airport. No areas were cordoned off and protective measures were not taken, though officials announced Friday that the facility would be decontaminated.
The two women - one Indonesian and one Vietnamese - have been detained, along with a North Korean man. Seven other North Koreans have been named as suspects or are wanted for questioning.