Police suspect that the death of Vignesh, 19, is linked to the dangerous and self-destroying game, that has claimed over 100 lives across the world.
Investigators say the second year commerce student at a private college was part of a Whatsapp group of 75 members who are playing the suicide game.
"Blue Whale - This is not a game but danger. Once you enter, you can never exit," Vignesh wrote in a chilling note found in his home in Madurai on Wednesday. He was addicted to his mobile, according to his brother and other family members.
The Chennai police has issued an advisory for parents to keep a tab on the social media activities of their children. On Thursday, the Madurai Collector announced special cells to raise awareness about Blue Whale Challenge in colleges.
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