ROME — Tens of thousands of people marched through the streets of the Italian capital in anti- and pro- migration demonstrations Saturday, after a far-right citizens’ initiative seeking sweeping measures against migrants garnered enough support to be brought to Parliament.

A petition by the initiative, named “Remigration and Reconquest,” gathered the 50,000 signatures needed to trigger parliamentary discussion, pushing the once-fringe concept of “remigration” into the political mainstream. No date has been scheduled yet for a vote.

The proposal, promoted by right-wing groups, calls for sweeping measures targeting foreigners, including coercive returns, incentives to leave Italy and broader policies critics say could extend to legal residents.

Several thousand demonstrators from around Italy gathered for the anti-migration march, singing the national anthem. On several occasions, many of them raised their arms in the fascist salute, shouting “Duce! Duce!,” a reference to Italian dictator Benito Mussolini, who ruled Italy from 1922 to 1943.

A rival, pro-migration demonstration saw tens of thousands of people take to the streets in another part of Rome Saturday evening. That march was attended by various left-wing groups and trade unions, with some demonstrators waving Palestinian flags.

Thousands of police were deployed to ensure the two rival groups would remain apart. No violence was reported.

The debate on migration represents a delicate balancing act for Premier Giorgia Meloni’s right-wing coalition. While the anti-migration League has backed opening discussion, Meloni’s Brothers of Italy and centrist allies have been more cautious about endorsing a proposal linked to extremist circles, amid concerns over legal risks and internal divisions.

Critics, including opposition parties and legal experts, argue the proposal would violate constitutional and international anti-discrimination principles by targeting people based on ethnic background, including naturalized citizens and their descendants.

The controversy comes even as Meloni’s government pursues a parallel policy of expanding legal migration, having approved a multiyear plan to admit hundreds of thousands of non-EU workers to address labor shortages in key economic sectors.

The demonstrations in Rome a day after a new set of European Union rules came into effect governing how each of the bloc’s 27 member states will deal with irregular migration and asylum seekers.

The European Migration and Asylum Pact is the culmination of years of grueling negotiations that overhauled the previous system, which was widely considered a failure and gave far-right parties a potent issue to win votes.