President Trump says the the 30,000-person facility for undocumented migrants will house "the worst criminal illegal aliens".

The US has maintained a migrant detention facility there for decades that is separate from the notorious high-security jail for foreign terror suspects, including alleged 9/11 mastermind Khalid Sheikh Mohammed.

Cuban President Miguel Díaz-Canel condemned President Donald Trump's announcement that 30,000 deported migrants would be housed at the Guantanamo Bay Naval base. Díaz-Canel called the move an "act of brutality" and said the base is "illegally occupied" in Cuba in a post to X on Wednesday.

Trump provided few details but said it would house "the worst criminal illegal aliens threatening the American people." He announced the move during a bill signing ceremony at the White House for the Laken Riley Act,

U.S. President Donald Trump said on Wednesday he will order the Pentagon and the Department of Homeland Security to prepare a migrant detention facility at Guantanamo Bay for as many as 30,000 migrants.