United States immigration authorities have arrested 475 people in a raid on a Hyundai manufacturing site in Georgia, Steve Schrank, a special agent in charge of Homeland Securities Investigations Atlanta, said at a press conference on Friday.

The Hyundai facility, located in Ellabell, Georgia – approximately 30 miles west of Savannah – was raided “as part of an ongoing criminal investigation into allegations of unlawful employment practices and other serious federal crimes,” according to a statement from the Department of Homeland Security.