Paedophile teacher and his gang had 100 victims

In the Siberian city of Krasnoyarsk, a schoolteacher is one of three paedophiles to be found guilty of committing sex acts on more than one hundred children and producing pornographic material.

The three men were sentenced to 15, 10 and 9 years in prison respectively.

Investigations into the group started in 2005, though some images discovered date back to 1997.