Lawyers for the migrants say they were given abrupt notice regarding their clients’ removal to South Sudan, a war-torn nation facing a hunger crisis.

Lawyers for the immigrants, who aren’t from South Sudan, contend the deportations violate a court order after a previous attempt to send some people to Libya.

In a chaotic hearing, Trump administration officials told a federal judge they did not know where a plane of deportees was going. The judge raised the possibility that he could order its return.