The fate of dozens of detainees in Texas remained in limbo Saturday after an extraordinary middle-of-the-night emergency action by the Supreme Court temporarily barred their removal by the Trump administration.

The court did not explain its reasoning in its unsigned emergency order issued around 1 a.m. but directed the Trump administration “not to remove any member of the putative class of detainees” from the United States until further action from the Supreme Court. Two conservative justices, Clarence Thomas and Samuel A. Alito Jr., dissented.