As many as 700 migrants are feared to have been killed, following a series of shipwrecks, off the coast of Libya, over the past few days.
At least 700 migrants are feared drowned in a series of shipwrecks off the coast of Libya in the last few days, the UN refugee agency says.
The boats sank south of Italy on Wednesday, Thursday and Friday as the migrants tried to reach Europe in non-seaworthy vessels.
Spring weather has led to a surge of people attempting the perilous crossing from Africa to Europe. EU ships have rescued almost 13,000 migrants this week, Italy says.