Pakistan has blocked the popular video sharing website YouTube for 'blasphemy'. The Pakistan Telecommunication Authority (PTA) directed Internet service providers to stop access to social network Facebook indefinitely because of an online competition to draw the Prophet Mohammad. CEO of an Internet service provider said, PTA issued an order seeking an ‘immediate’ blockade of YouTube. It was a serious instruction as they wanted us to do it quickly.YouTube was also blocked in the Muslim country in 2007 for about a year for what it called un-Islamic videos. A PTA official said, the action was taken after the authority determined that some caricatures of the Prophet Mohammad were transferred from Facebook to YouTube. Any representation of the Prophet Mohammad is deemed un-Islamic and blasphemous by Muslims.Publications of similar cartoons in Danish newspapers in 2005 sparked deadly protests in Muslim countries in which 50 people were killed during violent protests. Al Qaeda claimed responsibility for a suicide attack on Denmark's embassy in Islamabad in 2008, killing six people, saying it was in revenge for publication of the caricatures.