Sick teen filmed himself killing boy,9 and then bragged about it on dark web'

 A huge manhunt is on in Germany after a teenager allegedly stabbed a nine-year-old boy to death and posted a video of the murder on the internet.

Police were called on Monday after the child's body was found in the cellar of a home in Herne, North Rhine-Westphalia.


The alleged killer has been named as Marcel H(pictured above), a martial arts enthusiast, who reportedly filmed the murder and uploaded it onto the dark web.Daily Mirror reports.

An dark web user, who claimed to know the alleged killer, contacted police to tell them: "I have just seen a boy murdered on the internet."

The alleged killer is also believed to have entered a chatroom after the murder and held his bloodstained hands up to the camera.Little is known about Marcel H, except that police said he is dangerous and warned the public not to approach him.

He is understood to have fled in camouflage clothing.