President Donald Trump, who made the deportation of immigrants a central part of his campaign and presidency, said Wednesday that the U.S. will use a detention center at Guantánamo Bay, Cuba, to hold tens of thousands of the “worst criminal aliens.

Human rights groups have accused U.S. authorities of using Guantánamo Bay for decades to detain migrants fleeing Haiti, Cuba and other Caribbean nations.

President Donald Trump on Wednesday signed a memorandum directing the federal government to prepare the US Naval base at Guantanamo Bay, Cuba, to house tens of thousands of migrants.