The Indonesian suspect in the death of North Korean leader Kim Jong-un's half brother was paid $90 (£72) to help carry out what she thought was a "prank", Indonesia's deputy ambassador to Malaysia has said.
Andriano Erwin repeated Siti Aisyah's previous claim that she was duped into taking part in the plot, which involved a VX nerve agent.
Aisyah, 25, is in custody in Malaysia following the death of Kim Jong-nam, 45, who died shortly after appearing to be attacked at Kuala Lumpur airport while he was waiting to board a flight to Macau on February 13. Another alleged attacker, a Vietnamese woman, has also been arrested.
Malaysian police confirmed on Saturday the airport would be swept for toxic chemicals.
The check will involve officers from the police's chemical, biological, radiological and nuclear teams, as well as the hazardous materials unit.
Swabs taken from Kim Jong-nam face's revealed he had been sprayed with VX nerve agent - classified by the United Nations as a weapon of mass destruction.
Malaysian police announced on Friday that tests on the eyes and face of a North Korean national had been conducted.
The substance reported to have been found on his person is also known as S-2 Diisoprophylaminoethyl methylphosphonothiolate.
Malaysian police strongly suspect that North Korea is behind the killing, though have not directly blamed them. They said on Saturday they would issue an arrest warrant for a North Korean diplomat if he refused to cooperate with the investigation.
Authorities had been unable to call Hyon Kwang Song, a second secretary at the North Korean Embassy in Kuala Lumpur, in for questioning earlier in the week because of his diplomatic immunity.
So far, officers have identified a total of eight North Koreans suspected of being linked to Kim's death. One is currently being held in custody.