Supporters of Iran's President Hassan Rouhani wave flags during a campaign rally in Tehran on May 9. Iranian authorities have targeted messaging app Telegram ahead of the May 19 elections. (AP/Vahid Salemi)
Supporters of Iran's President Hassan Rouhani wave flags during a campaign rally in Tehran on May 9. Iranian authorities have targeted messaging app Telegram ahead of the May 19 elections. (AP/Vahid Salemi)

Iran targets Telegram app as it seeks to control news ahead of May election