Police investigation into the suicide of a 19-year-old student has revealed that the victim had played the Blue Whale Challenge - a dare-based "game" for 50 days.

Vignesh, a second year college student from Thirumangalam, Madurai committed suicide by hanging himself on Wednesday. He was found hanging around 4:15 PM.

Police confirmed that the image of a whale was carved on Vignesh's left forearm with the words "Blue Whale" written beneath it. A note was also recovered from the spot which said, "Blue Whale- This is not a game but danger. Once you enter, you can never exit". Vignesh's friends told the police that they saw him attempting the Blue Whale Challenge on his phone. Police have confiscated the phone and are analysing if his friends might have taken the challenge too.

A special team has been created for investigation, which will involve analysts from cyber-crime wing as well.

"We have created a separate WhatsApp group for parents to complain about children playing Blue Whale game and we'll directly go to the child's home with Councillors to analyse the situation," said Manivannan, Superintendent of Police, Madurai district.

Tamil Nadu Police had recently released a circular asking parents to keep an eye for children attempting the Blue Whale Challenge on the computer or their phones and to monitor their behaviour. Police have once again requested the parents to be more vigil.

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