Teenage naughty chatrooms
In the weeks before she died, the girl became convinced she was overweight and ate only light salads. Diana Kuznetsova, 16, died after she fell from a nine storey building in Ryazan.
In December, Vilena Piven, 15, jumped from the 13th floor in Mariupol, Ukraine and died on the spot.
Speaking anonymously, he said: 'We found her with a gun in her hand next to her Chechen husband, who was then killed by Iraqi forces in a firefight.
She said she had killed a number of our men in the battle.''She was a Daesh sniper, but maybe her husband pressured her into it.
In Russia, victims are reported to include Yulia Konstantinova, 15, and Veronika Volkova, 16, fell to their deaths in February this after it is believed they were involved in a Blue Whale group.
Angelina Davydova, aged only 12, fell to her death from the 14th floor of a block in central Russia on Christmas Day 2015 after logging onto a user group called 'Wake Me Up at 4.20' which had more than a quarter of a million subscribers before it was blocked.