EDITORS' NOTE: Reuters and other foreign media are subject to Iranian restrictions on leaving the office to report, film or take pictures in Tehran.

Hamas leader Khaled Meshaal (L), Iran's Parliament speaker Ali Larijani (C) and Ramadan Shallah, head of the militant Palestinian Islamic Jihad group, hold up their hands as a sign of unity during the International Conference on National and Islamic Unification of Palestine Future in Tehran February 28, 2010. REUTERS/Morteza Nikoubazl (IRAN - Tags: POLITICS)