The request from U.S. District Judge Stephanie Gallagher comes after the government of El Salvador, in a report by the United Nations submitted in a separate lawsuit, said that the migrants sent by the U.S. to CECOT are under the authority of the United States.

In response to UN inquiries, Salvadoran authorities denied past US claims and stated that they have only facilitated the use of their infrastructure

The government of El Salvador has admitted to U.N. investigators that the Trump administration controls the fate of nearly 140 Venezuelan immigrants transferred from the U.S. to the notorious CECOT mega-prison.