The Trump administration said on Friday that it was terminating long-running deportation protections for Haitians in the United States, declaring that the violence-plagued Caribbean nation was now safe enough for the program to end by September.

The announcement, by the Department of Homeland Security, continues the administration’s campaign of revoking special protections afforded to migrants from some of the most unstable and desperate places in the world. Hundreds of thousands of other immigrants who had previously been authorized to remain in the country, including Afghans, Cubans, Nicaraguans and Venezuelans, could face deportation.

Kristi Noem, the homeland security secretary, had foreshadowed that Haiti would be on the list, signing a decision in February revoking an extension of the protection, called Temporary Protected Status, for hundreds of thousands of Haitians.

The publication of a notice in the federal register, dated Friday, set the plan in action and underscored the threat of deportation for more than 300,000 Haitians who have been protected under the program. The department said the program would expire on Sept. 2, although the administration’s plan may face challenges in court.

The Obama administration first granted the immigration status to Haitians in the United States in 2010, after a catastrophic earthquake rocked the island nation. The program has been repeatedly extended in the years since; an attempt in 2019 by the first Trump administration to end it was blocked by legal challenges.

Republicans have argued that the protections for migrants from unstable places have strayed far from their original mission of providing temporary shelter from conflict or disaster. In its statement on Friday, the department said the termination of the program for Haitians “restores integrity in our immigration system and ensures that Temporary Protective Status is actually temporary.”