Matteo Salvini | Alberto Pizzoli/AFP via Getty Images Matteo Salvini: Italy’s ports are closed to migrant vessels ‘I won’t give up and I’m doing it for everybody’s sake,’ Italy’s interior minister said.

Italy's Matteo Salvini warned Saturday that no NGO-operated ships carrying migrants would be allowed to dock at Italian ports.

"Italy no longer wants to be an accomplice of human traffickers and contribute to the business of illegal immigration," Matteo Salvini, who leads the far-right League, said in a Facebook post on Saturday.

More than 600 migrants are expected to reach Italian shores on Saturday on board Italian, British and U.S. military ships, according to a statement by the Italian interior ministry cited by La Repubblica.

Salvini's post specifically targeted NGO-operated two ships flying Dutch flags — which he described as "waiting for their load of human beings abandoned by smugglers" in Libyan waters — and insisted they would not be granted access to Italian ports.

"As a father and as a minister, they can attack and threaten me all they want, but I won't give up and I'm doing it for everybody's sake," Salvini said.

A private German NGO working onboard one of the vessels hit back against Salvini, saying in a tweet "the fascists" were providing them with "advertising." Salvini promptly replied the assertion was "crazy" and that the "good days" for migrants and charities are over.

The NGO later deleted its original tweet and said,"No, Matteo Salvini is of course not a fascist."

5Star Infrastructure Minister Danilo Toninelli also weighed in Saturday, tweeting that the Netherlands should "recall the two rescue vessels [because] they are not properly equipped to save lives."

The Aquarius — the vessel Salvini blocked from docking in Italy last week — is set to reach Valencia, where Spain's premier has said it will be allowed to unload its more than 600 passengers, on Sunday.

A poll published Saturday by Italian daily Corriere della Sera showed 59 percent of Italians are in favor of the new government's migration policy. Center-right and 5Star voters overwhelmingly support Salvini's "hardline" policy as do one in three Democratic Party voters, according to the poll.