Police stop the people who fled the unrest in Tunisia from leaving the immigration centre during their protest against being sent back to their country, on the southern Italian island of Lampedusa April 11, 2011. Prime Minister Silvio Berlusconi stepped up calls on Saturday for Europe to help deal with the „human tsumani“ of refugees and illegal immigrants from North Africa arriving in southern Italian islands in recent weeks. REUTERS/Antonio Parrinello (ITALY – Tags: SOCIETY POLITICS CIVIL UNREST)
