The attack caused the third highest staff casualties in the history of the United Nations , after the 2003 Canal Hotel bombing , which targeted the UN headquarters in Baghdad , Iraq and also killed the Secretary-General 's Special Representative to Iraq Sérgio Vieira de Mello and 21 other staff members and the 2010 Haiti earthquake in which 22 UN peacekeepers have been confirmed dead as of January 14 , 2010 ; and 150 missing . The Head of MINUSTAH was killed in the disaster
Canal Hotel bombing
Canal Hotel bombing
December 11, 2007 Algiers bombings