The migrants—citizens of Vietnam, Jamaica, Cuba, Yemen, and Laos—had served prison sentences in the U.S. for serious crimes, according to the Department of Homeland Security (DHS). Homeland Security Assistant Secretary Tricia McLaughlin described the five men as "individuals so uniquely barbaric that their home countries refused to take them back."

The government of Eswatini has confirmed that the migrants are currently being held in its prisons. They have been put in isolated cells, as authorities acknowledged “widespread concerns” about the mi

As it seeks to ramp up deportations, the Trump administration has sent some migrants to far-flung places that aren't their home countries.

The US has deported immigrants from Vietnam, Jamaica, Laos, Cuba and Yemen to Eswatini in Southern Africa following a recent Supreme Court ruling on third country deportations.

The U.S. Homeland Security Department said on Tuesday a deportation flight carrying immigrants from different countries had landed in Eswatini, in a move that follows the U.S. Supreme Court lifting limits on deporting migrants to third countries.

The International Organization for Migration (IOM) was not involved in the removal of third-country migrants from the United States to Eswatini and has not been contacted to helpsend them back home, the agency said on Thursday.