The lawsuit says there is no legitimate reason to send migrants to Guantánamo because the U.S. has ample detention facility.

The base had been cleared of migrants since Thursday, after the government sent 177 to Venezuela and one back to the United States.

Civil rights attorneys sued the Trump administration Saturday to prevent it from transferring 10 migrants detained in the U.S. to Guantanamo Bay, Cuba, and filed statements from men held there who said they were mistreated there in conditions that of one of them called “a living hell.

The administration flew almost all of the migrants it had held in the facility in Cuba to Honduras, and one to detention in the U.S., NBC News has learned.

It’s their second legal challenge in less than a month over plans for holding up to 30,000 immigrants there for deportation.

Civil rights attorneys have filed a lawsuit against the Trump administration to prevent the transfer of undocumented immigrants from the United States to Guantánamo Bay, Cuba