An image grab taken from a handout video reportedly shows a group of men pushing traffic barriers in a street in Tehran on December 30. pics/afp

Iran's supreme leader blamed the country's "enemies" yesterday for days of unrest that have seen 21 killed and hundreds arrested. "The enemies have united and are using all their means, money, weapons, policies and security services to create problems for the Islamic regime," Ayatollah Ali Khamenei said in a speech carried on state television. Iranian officials have said online accounts in the United States, Britain and Saudi Arabia are fomenting protests.