The mayor of Palermo has urged European Union leaders to respond to "a genocide caused by European selfishness".
Leoluca Orlando spoke as the patrol vessel Niamh arrived with 370 survivors of Thursday's disaster and 25 corpses, including the bodies of children.
Orlando called on European leaders to do more to prevent such disasters and to allow more refugees to settle in their countries.
The mayor said that a new generation of mafia mobsters was planting roots in Italy due to the EU's failure to allow migrants to enter Europe legally and find work.
Orlando, who is credited with breaking the hold of Cosa Nostra, the Sicilian mafia, on Palermo's regional Government during his 30-year political career, said the system was feeding "organised crime, death and violence" by forcing migrants to operate outside the law.