EDITORS' NOTE: Reuters and other foreign media are subject to Iranian restrictions on their ability to film or take pictures in Tehran.

Two Iranian students hold up a copy of Muslims' holy book, the Koran, during a demonstration in support of the anti-government protests in Bahrain, outside the Bahrain embassy in Tehran April 30, 2011. REUTERS/Morteza Nikoubazl (IRAN - Tags: CIVIL UNREST POLITICS RELIGION)