Five immigrants deported by the United States to the small southern African nation of Eswatini under the Trump administration's third-country program are in prison, where they will be held in solitary confinement for an undetermined time,

"A safe third country deportation flight to Eswatini in Southern Africa has landed — This flight took individuals so uniquely barbaric that their home countries refused to take them back," U.S. Department of Homeland Security spokeswoman Tricia McLaughlin said late on Tuesday.

The Trump administration sent five deportees to Eswatini, an African kingdom, saying that their own countries would not take them. But Eswatini says it will send them home.