A 28-year-old woman, who was carrying a Vietnamese passport, was arrested the previous day after reports said two female assassins sprayed toxins in the victim's face at Kuala Lumpur International Airport.
Inspector-General of Police Tan Sri Khalid Abu Bakar confirmed the detention of the second woman to Malaysia's Bernama news agency without providing further details, adding that an official statement will be issued later Thursday,
Selangor state police chief Abdul Samah Mat told AFP earlier that officers were looking for several suspects.
The first woman is due to appear in court on Thursday.
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