Federal agents on Sept. 4 arrested hundreds of people at a sprawling battery plant construction site in Georgia in one of the Trump administration’s largest immigration raids.

The federal Bureau of Alcohol, Tobacco, Firearms and Explosives announced agents from the Department of Homeland Security, FBI and the Drug Enforcement Agency, as well as Georgia State Patrol took part in the operation at Hyundai’s battery plant in Bryan County, southwest of Savannah. Agents apprehended about 450 people suspected of being in the country illegally, ATF said in an X post.

DHS said in an email that Immigration and Customs Enforcement's Homeland Security Investigations executed a judicial search warrant for an ongoing criminal investigation for alleged unlawful employment practices and other federal crimes.

The agency didn't clarify how many agents took part in the operation, nor the charges that those detained face.

"We are making many arrests of undocumented individuals," Steven Schrank, special agent in charge of Homeland Security Investigations Atlanta, said at a news conference streamed by local news stations. "We have encountered many lawful employees working here, United States citizens and lawful permanent residents, and they are of course being released."