Hamas prevents senior UN staffer from leaving Gaza February 14, 2016Hamas police in Gaza. (AP/Khalil Hamra)(AP/Khalil Hamra)Hamas prevents senior UN staffer from leaving GazaHamas continues to demonstrate its position as a terror organization, intimidating even the UN. By: APA United Nations (UN) official says the Islamic Hamas terror group, which rules the Gaza Strip, has prevented a senior employee of the international organization from leaving the Gaza Strip.The official said Mahmoud Daher, the Palestinian head of the World Health Organization’s Gaza office, was barred from leaving Thursday. The official spoke on condition of anonymity because he was not authorized to discuss the incident.The official said Hamas announced two weeks ago that international organizations would need a Hamas-issued exit permit when leaving to Israel.The organization had previously been exempt from acquiring the permit. The UN asked for a month to study the request.The move appears to be an attempt by Hamas to exert its influence on the UN, which provides assistance to thousands of impoverished Gazans. GazaHamasMahmoud DaherUnited Nations