Omar Artan was one of 52 referees selected for the FIFA World Cup. But on Saturday he was denied entry because of “vetting concerns,” U.S. officials said.

The virologist was stopped at the Detroit airport after working in Congo during a mpox epidemic. His lawyer said the material was for research.

The judge had previously ruled that the woman had been improperly deported by the Trump administration and had ordered her returned to the United States.