New protests erupt in Iran as supreme leader signals upcoming crackdown

Ayatollah Ali Khamenei calls protesters vandals' and saboteurs' and blames US for instigating the unrest

Iranians took to the streets in new protests on Friday to press the biggest movement against the Islamic republic in more than three years, as authorities sustained an internet blackout as part of a crackdown that has left dozens dead.

Iran's supreme leader vowed that authorities will not back down in the face of the rapidly growing protest movement, setting the stage for an intensified violent crackdown.