Tren de Aragua (Train of Aragua, or Aragua Train) has roots in Tocorón prison in Venezuela’s northern Aragua state, which the group’s leaders had transformed into a mini-city with a pool, restaurants and a zoo.

A federal judge on Saturday night ordered an immediate two-week halt to all deportations of Venezuelan illegal immigrants with ties to the Tren de Aragua gang as he weighs the legality of President Donald Trump‘s invocation of the Alien Enemies Act to do so.

A federal judge temporarily blocked Donald Trump's attempt to deport alleged Venezuelan gang members using the Alien Enemies Act of 1798. Trump claimed the Tren de Aragua gang posed a national security threat.