The Momo challenge was first reported in July last year, and was described as a new 'Blue Whale' style suicide game.
It started on WhatsApp, and challenged users to contact 'Momo' by sending messages to an unknown number.
The user was then hounded with frightening images and violent messages.
Children are contacted on WhatsApp and other online platforms by the cartoon Momo, who is encouraging children to self-harm
No one knows exactly where Momo originated, or who is behind the disturbing trend, though it was linked to at least seven phone numbers beginning with codes from Japan and multiple countries across Latin America.
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