The American Civil Liberties Union (ACLU) asked the Supreme Court Friday to immediately intervene to block the Trump administration from deporting Venezuelan migrants being held in Texas to El Salvador under the rarely used Alien Enemies Act.

The ACLU’s emergency application says many migrants are already on buses, “presumably headed to the airport” to be deported to a notorious Salvadoran megaprison where an initial round of more than 100 migrants were sent last month.

“Emergency relief is necessary not only to preserve the status quo and prevent permanent and irreversible harm to Applicants, but also to preserve the courts’ jurisdiction, in light of the government’s position that it need not return individuals, even those mistakenly removed,” the application states,

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