Video-sharing website YouTube has removed hundreds of pornographic videos which were uploaded in what is believed to be a planned attack.
The material was uploaded under names of famous teenage celebrities such as Hannah Montana and Jonas Brothers. Many started with footage of children's videos before groups of adults performing graphic sex acts appeared on screen. YouTube owner Google said it was aware and addressing the problem.
Under other uploaded videos, online users posted comments such as: "Take the tags off, you'll get us caught." Another said: "Your gonna kill us all!" As the disturbing videos were being uploaded, many viewers added them to their favourites and rated them highly.
(Source : BBC)