Iran has banned all use of the popular Telegram messaging app. The ban had been introduced to protect "national security," said a statement aired on state television. From a report: Iran had been considering the ban since January when protests over economic grievances erupted in more than 80 cities and later turned into demonstrations against the clerical and security elite of the Islamic Republic. Some hardline officials said protesters used Telegram to organize the rallies, which were ultimately contained by the Revolutionary Guards and their affiliated volunteer Basij militia. The app was temporarily blocked in January. "Considering various complaints against the Telegram social networking app by Iranian citizens, and based on the demand of security organizations to confront the illegal activities of Telegram, the judiciary has banned its usage in Iran," state TV reported. "All Internet providers in Iran must take steps to block Telegram's website and app as of April 30," the judiciary website Mizan quoted a court order as saying.