A federal judge on Monday said the U.S. government denied due process to the Venezuelan men it deported to a prison in El Salvador in March after President Trump invoked the Alien Enemies Act.

The case over the Alien Enemies Act first brought into focus critiques about the Trump administration’s lack of due process in its immigration policy.

The American Civil Liberties Union and Democracy Forward challenged the deportation of the Venezuelans, saying the Alien Enemies Act was invoked illegally and that the men should have been given the opportunity to argue against their removal.