At least six migrants have died, including a woman and her 1-year-old child, after three boats sank in the Mediterranean Sea, one off Tunisia’s Kerkennah Islands and two near the Italian island of Lampedusa. Dozens of people are still missing. Most of the migrants are from sub-Saharan Africa. Separately, Tunisian authorities said they had found the bodies of another 10 people on a beach near the port city of Sfax, which has become a hub for migrants hoping to reach Europe for refuge.