Tunisia rescue missions saved more than 350 migrants in the Mediterranean Sea on Wednesday, the local Red Cross said.
They attempted to sail from Libya to reach the Italian island of Lampedusa.
"Naval forces have rescued at least 350 clandestine migrants off the coast near Ben Guerdane in an old boat that left from Libya," local Red Cross representative Abd el Karim Rguiyi told Reuters.
"Among them are Syrians and families, Africans. Authorities are looking to save around 300 more," he said.
According to the United Nations, nearly 2,000 migrants have died trying to cross the Mediterranean so far this year.
Last year, around 219,000 migrants arrived on the European coast and 3,500 died at sea.
Over 36,000 migrants arrived in Italy since the beginning of the year, according to Frontex.