Some 475 people were detained during an immigration raid at a sprawling Georgia site where South Korean auto company Hyundai manufactures electric vehicles, according to a Homeland Security official.

Steven Schrank, Special Agent in Charge, Homeland Security Investigations, said at a news briefing Friday that the majority of the people detained were from South Korea.

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“This operation underscores our commitment to jobs for Georgians and Americans,” Schrank said. “This was in fact the largest single-site enforcement operation in the history of Homeland Security Investigations."

The investigation has been ongoing for several months, with authorities receiving leads from community members and former workers, he said.

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