The Trump administration has reportedly deported a group of immigrants from Burma and Vietnam to the nation of South Sudan, potentially in violation of a previous federal court order that restricts the removal of immigrants to a “third country” without proper due process. On Tuesday evening, U.S. District Judge Brian E. Murphy in Boston ordered Trump officials to maintain custody of the immigrants transferred to South Sudan to “ensure the practical feasibility of return” in case the court finds their removal is illegal and orders their return to the U.S.

One of the Burmese immigrants flown to South Sudan, identified in court documents as “NM,” has limited English proficiency and refused to sign a removal order given to him in English only. This comes amid increasing conflict and fears of a new civil war in South Sudan.