In a statement released Friday, the U.S. attorney’s office in the Southern District of Georgia said the operation — which was the largest single-site raid in the Department of Homeland Security’s history — was part of a nationwide initiative, known as Operation Take Back America, to “repel the invasion of illegal immigration.”

U.S. border czar says such workplace raids will continue, as South Korea says a plane will be sent to repatriate the workers taken into custody in Georgia.

US immigration officials detained 475 workers on Thursday - most of them South Korean nationals - saying they were working illegally.