President Trump says he will use a detention center at Guantánamo Bay to hold tens of thousands of criminal immigrants in the U.S. illegally.

President Donald Trump said Wednesday he is ordering officials to establish a massive migrant detention facility at the Guantánamo Bay Naval Base in Cuba. He made the announcement during a signing ceremony for the Laken Riley Act, which allows authorities to detain undocumented immigrants accused of theft-related crimes.

Migrant advocates on Thursday were speaking out against plans by President Donald Trump to revamp Guantánamo Bay to detain and hold thousands of undocumented immigrants sent from the United States.