A chemical product linked to the VX nerve agent was detected on the clothes on the two women accused of murdering Kim Jong Nam, a government chemist told a Malaysian court on Thursday.

In the fourth day of the murder trial of Doan Thi Huong and Siti Aisyah, Dr. Raja Subramanian told the court that both Huong and Siti’s clothing had, at the time of the attack on Kim Jong Nam, exhibited parent components of VX.

Components of VX were also found in Huong’s fingernails, Raja said.