A BBC investigation has led British authorities to remove online videos of children engaged in vicious fights, reports the BBC.

The new organization's reports found videos of children as young as 11 engaged in intense and savage fistfights. Police say it is the responsibility of companies like YouTube to remove offensive or illegal material from their sites. But YouTube, for its part, says it relies solely on users to flag inappropriate material.

Child-fighting videos became an unexpected hit in the UK among those seeking quirky and humorous material over the video sharing site.