Italian populist Interior Minister Matteo Salvini has blocked migrant ships from docking in Italy as his government cracks down on mass-migration into the country.Salvini declared that ships will only be approved for docking if all of the occupants onboard have been relocated elsewhere in Europe first.Italy's leader was responding to an incident where a group of migrants was picked up by an Italian fishing boat named the Accursio Giarrantano, according to an Il Giornale report.