The 3,000-acre site, which was built by the Korean automobile manufacturer to make electric vehicles, had been operational for a year. The Department of Homeland Security told the BBC that agents executed a search warrant due to allegations of "unlawful employment practices and other serious federal crimes". Korean nationals were among those detained, the South Korean foreign ministry said, calling it an "unjust infringement" of their rights. Hyundai Motor Company said it was aware of the incident at the HL-GA Battery Company construction site and was "working to understand the specific circumstances". "As of today, it is our understanding that none of those detained is directly employed by Hyundai Motor Company," it said in statement. "We prioritize the safety and well-being of everyone working at the site." (BBC)