Teen spoke of bullying revenge:

A teenage gunman who killed 20 people in a Crimean college had spoken of taking revenge for bullying, a girl claiming to be his ex-girlfriend said Thursday, while Russian President Vladimir Putin said the massacre was influenced by American shootings. Putin said at a forum in the southern city of Sochi that the killing was the “result of globalisation” and the continuation of a trend that had begun in the US.

“We do not create enough good (online) content for young people. This leads to this kind of tragedy,” said the president, whose government has in recent years increased its control on the internet.