A Tunisian army tank guards outside the American embassy after it was attacked by protesters in Tunis September 15, 2012. The death toll from Friday's attack on the U.S. embassy in Tunis, provoked by a film that mocks the Prophet Mohammed, rose to four, with 46 people injured, a hospital official said. Police fought hundreds of protesters who smashed windows, hurled petrol bombs and stones at police from inside, and started fires in the embassy. A Reuters reporter saw police open fire on protesters forcing their way into the embassy building. REUTERS/Zoubeir Souissi (TUNISIA - Tags: POLITICS CIVIL UNREST RELIGION TPX IMAGES OF THE DAY)