A fire has broken out at Iran's notorious Evin prison, with footage posted online showing flames and smoke billowing from the area. Gun shots and alarms have been reported as coming from the jail, the primary site for detaining political prisoners. An official quoted by state media said "troubles" involving "criminal elements" were to blame for the blaze. The fire comes as Iran continues to be rocked by its most intense unrest in decades. Anti-government monitoring group 1500tasvir posted videos of the fire online, in one of which chants of "death to the dictator" - one of the main slogans...