The Tunisian authorities say at least 14 migrants have died in different shipwrecks in the Mediterranean over the last two days.
More than 50 are missing after the latest accident, in which a boat sank off the coast.
All those on board were from sub-Saharan Africa.
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Tunisia is a major gateway for irregular migrants from other parts of Africa attempting perilous voyages to Europe.
The Tunisian interior minister says the coast guard has recovered more than 900 bodies of drowned migrants so far this year.
