A record 1,500 migrants, mainly from Somalia and other parts of Africa, died trying to reach European shores in 2011 and the deadly odyssey continues from Libya, Reuters quoted the United Nations refugee agency (UNHCR) as saying on Tuesday. It said conditions in Tunisia and Libya prompted more people to flee last year, including sub-Saharan migrants working in North Africa, after tighter border measures sharply reduced arrivals in Europe in 2009 and 2010. "This makes 2011 the deadliest year for this region since UNHCR started to record these statistics in 2006," Sybella Wilkes, spokeswoman for the U.N. High Commissioner for Refugees (UNHCR), told a news briefing. The UNHCR toll is an estimate that includes people of 15 nationalities known to have drowned or gone missing in the Mediterranean Sea, which divides Europe and Africa. More than 58,000 people arrived in Europe by sea last year, also a record, including 56,000 who landed in Italy, half of them Tunisian, Wilkes said. Malta and Greece received 1,574 and 1,030 people, respectively, by sea. "Most were migrants, not asylum-seekers," she said. In addition, 55,000 "irregular" migrants crossed the land border between Greece and Turkey at Evros last year, according to Greek government figures. Italian, Maltese and Libyan authorities were making efforts to rescue boats in distress in the Mediterranean. But the UNHCR renewed its call for all ships to carry out their duty of rescuing vessels in distress, in line with international law.