A 17-year-old Russian girl who is alleged to be the mastermind of the notorious Blue Whale suicide game, which incited children to take their own lives, has been arrested.
The Russian police believe that the teenager is the primary administrator of the group. She allegedly pretended to be male in this role.
The horrific tasks include self-harming, watching horror movies and waking up at unusual hours, but these gradually get more extreme.
The police released a footage which shows the police searching the suspects' home in Kamchatka.
The video also shows the girl in her possessions had drawings showing self-harm and a portrait of the founder of the challenge, 22-year-old Philipp Budeikin.
The teenager issued threats to her victims to murder them or their family if they failed to complete tasks
Over 130 teenage deaths have been linked to Blue Whale - also known as F57 - in Russia, while the death of an Irish teenager in May raised fears that the sinister challenge could reach youngsters in the UK.