This reports claims regarding ISIS which evolved since 2003 assuming erstwhile names like ISI,ISIS and now IS:
The former employee at US National Security Agency (NSA), Edward Snowden, has revealed that the British and American intelligence and the Mossad worked together to create the Islamic State of Iraq and Syria (ISIS).
This news is being spread by many small time news houses like Gulf Daily News, and Iranian fars news agency who is obviously vociferously against ISIS, All of these reports originate from "fars" Iranian news agency. But I am yet to see any official confirmation from Snowden nor any NSA documents as a proof. Hence is this claim truthful based on the available evidences or how likely is this to be a true claim and can the leaked NSA documents be searched for this?