By Ted Hesson WASHINGTON (Reuters) -A U.S. civil rights group on Saturday sued to block the Trump administration from potentially transferring 10 migrants from the U.S. to a naval base in Guantanamo Bay,

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

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

Immigrant rights groups sued the Trump administration on Saturday in hopes of stopping the transfer of migrants from the U.S. to Guantanamo Bay.