An Italian coast guard vessel is seen with an helicopter during the search and rescue operation underway after a boat carrying migrants capsized overnight, in this still image taken from video

An Italian coast guard vessel is seen with an helicopter during the search and rescue operation underway after a boat carrying migrants capsized overnight, with up to 700 feared dead, in this still image taken from video April 19, 2015. As many as 700 people were feared dead after the fishing boat packed with migrants capsized off the Libyan coast overnight, in what may be one of the worst disasters of the Mediterranean migrant crisis, officials said on Sunday. Twenty-eight people were rescued and 24 bodies recovered from the 20 metre-long vessel, which sank around 70 miles from the Libyan coast, south of the southern Italian island of Lampedusa, the Italian coast guard said. REUTERS/Guardia Costiera/Handout via Reuters TV

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