Five migrants - four women and one child - drowned when their boat capsized off the Greek island of Samos close to Turkey's coast, Greek coast guard officials said on Saturday. Five other migrants were rescued, the officials said, and coast guard vessels assisted by a helicopter were searching for more survivors. The incident occurred a day after two ferries took more than 120 migrants back to Turkey from the Greek island of Lesbos, in the second round of returns under an EU deal with Ankara to halt mass migration across the Aegean Sea to Europe.