Story highlights An Indonesian woman and Vietnamese woman are accused of the murder

Kim Jong Nam was killed with a powerful VX nerve agent in Malaysia

Kuala Lumpur (CNN) Two young women pleaded not guilty in a Malaysian court Monday morning charged with the murder of North Korean leader Kim Jong Un's half-brother, Kim Jong Nam.

In one of the most audacious assassinations of the 21st century , Kim was poisoned with VX nerve agent at Kuala Lumpur International Airport in February on his way back to his home in the Chinese territory of Macau.

Security footage showed the two women, 25-year-old Indonesian Siti Aisyah, and 29-year-old Vietnamese citizen Doan Thi Huong, walking up behind Kim and rubbing their hands on his face.

Malaysian authorities claim the pair were trained by North Korean agents to swab Kim's face with the nerve agent.

Trial of Two women accused of murdering Kim Jong Nam has begun. #CNN #KimJongNam pic.twitter.com/qLvLChFJax — Kochakorn (@KochaOlarn) October 2, 2017

North Korea has repeatedly and vehemently denied any involvement in the assassination of Kim.