The United States has begun deportation flights to Guantánamo Bay, Cuba, after President Trump ordered the military to prepare to receive up to 30,000 people. On Tuesday, Customs and Border Protection said the first 10 immigration prisoners were flown from Fort Bliss, Texas, to the U.S. naval base at Guantánamo, where officials say they’ll be housed in tents surrounded by fencing and armed guards.

Refugees International condemned the plan as “gratuitously cruel, illegal, expensive, and burdensome,” adding, “Setting up an American gulag in the Caribbean in response to forced displacement in the Americas is a shameful low in U.S. history.”