French President Emmanuel Macron has called for strict action against undocumented Algerian migrants in France, escalating diplomatic tensions with Algeria. In a letter to Algeria’s prime minister, Macron urged the suspension of a 2013 visa exemption deal and tighter Schengen visa rules for Algerians. The move follows the arrest of a French-Algerian writer and journalist in Algeria, which Macron sees as a blow to free speech. The decision raises uncertainty for many Algerian migrants, especially those awaiting asylum or without legal papers.