Authorities have removed U.S. immigrants from detention facilities at Guantanamo Bay as a federal court in Washington weighs a challenge by civil rights advocates to holding immigrants at the offshore military station.

All 40 illegal migrants held at the Guantánamo Bay U.S. naval base in Cuba have been sent back to the United States and are now being held in Louisiana, two U.S. defense officials told Fox News.

All of the remaining migrants being held at Guantanamo Bay in Cuba have been moved to Louisiana over the last two days, according to a U.S. official.

More than 100 demonstrators gathered outside the New York City courthouse, with many signs supporting Mahmoud Khalil.

Immigration enforcement agents arrested Mahmoud Khalil, a permanent U.S. resident who is married to an American citizen, in New York on Saturday.