Libyan migrants reach record levels
Italy coast guard: More than 2,000 migrants rescued at sea
More than 7,100 people have now been plucked from international waters since Thursday.
Facebook has apologised after they temporarily took down photos of a shipwreck off the coast of Libya.
A boat carrying migrants sank off Libya's Mediterranean coast, the second such fatal accident within days.
Public outrage peaked this week after up to 900 migrants died last Sunday when their boat sank.
The IOM said 40,000 migrants worldwide are believed to have drowned since 2000.
The UN Refugee Agency says most of the deaths have been in the past three months.
Thousands attempted to cross to Europe by boat over the weekend, the Italian navy said.
Migrants have been streaming out of North Africa in rickety boats in rising numbers for years.
A rights group has revealed accounts of torture and inhumane conditions in Libyan detention centres.