Law enforcement conduct a major immigration operation at the construction site of a Hyundai battery plant in Georgia Thursday, as seen in this image released by the ATF's Atlanta office. Credit: ATF Atlanta/X via CNN Newsource

(CNN) โ€”ย Hundreds of federal officers descended on a small southeast Georgia community and raided the Hyundai Metaplant โ€“ arresting 475 people in the largest sweep yet in the current Trump administrationโ€™sย immigration crackdown at US worksites.

The majority of those arrested Thursday at the enormous site in Ellabell โ€“ about 25 miles west of Savannah, Georgia โ€“ are Korean nationals, said Steven Schrank, a Homeland Security Investigations special agent in charge. Schrank said he did not have a breakdown of the arresteesโ€™ nationalities.

All 475 people taken into custody were suspected of living and working illegally in the US, Schrank said. Some entered into the US illegally; some had visa waivers and were prohibited from working; and some had overstayed their visas, he said.

During the raid, several people tried to flee โ€“ including some who โ€œran into a sewage pond located on the premises,โ€ the US Attorneyโ€™s Office for the Southern District of Georgia said in a news release.

โ€œAgents used a boat to fish them out of the water. One of the individuals swam under the boat and tried to flip it over to no avail. These people were captured and identified as illegal workers,โ€ the release states.

Schrank noted that some of the workers may have been contractors or subcontractors.

โ€œWe continue to work on the investigation of who exactly worked for what companies,โ€ he said.

A Hyundai spokesperson told CNN he does not believe anyone arrested was a direct employee of Hyundai Motor Company.

โ€œHyundai is committed to full compliance with all laws and regulations in every market where we operate. This includes employment verification requirements and immigration laws,โ€ the company said in aย statementย Friday night.

Hyundai Motor North America Chief Manufacturing Officer Chris Susock will now manage the megasite and an investigation will be conducted to verify that suppliers and subcontractors comply with laws, according to the company.

โ€œWe are reviewing our processes to ensure that all parties working on our projects maintain the same high standards of legal compliance that we demand of ourselves. This includes thorough vetting of employment practices by contractors and subcontractors,โ€ the company said, adding, โ€œHyundai has zero tolerance for those who donโ€™t follow the law.โ€

The sprawling,ย 2,900-acre Hyundai Metaplant has two parts: a Hyundai electric vehicle manufacturing site, and an EV battery plant thatโ€™s a joint venture between Hyundai and LG.

The raid halted construction of the EV battery plant,ย The Associated Pressย reported.

LG did not respond to CNNโ€™s questions about how many arrested workers may have been employed by the company, and how many may have been contractors or subcontractors for LG.

But the company sent the following statement to CNN:

โ€œWe are closely monitoring the situation and gathering all relevant details. Our top priority is always ensuring the safety and well-being of our employees and partners. We will fully cooperate with the relevant authorities.โ€

The Hyundai Metaplant electric vehicle manufacturing facility in Ellabell, Georgia. Credit: Elijah Nouvelage/Bloomberg / Getty Images via CNN Newsource

How the Georgia raid happened

โ€œThis was not an immigration operation where agents went into the premises, rounded up folks and put them on buses,โ€ Schrank said.

โ€œThis has been a multi-month criminal investigation where we have developed evidence, conducted interviews, gathered documents and presented that evidence to the court in order to obtain judicial search warrants.โ€

At the Georgia site, masked and armed agents gave orders to construction workers wearing hard hats and safety vests as they lined up while officers raided the facility, video footage obtained by CNN showed.

ICE and Homeland Security Investigations were accompanied by the Georgia State Patrol, the FBI, DEA, ATF and other agencies in executing a search warrant.

โ€œTogether, we are sending a clear and unequivocal message: those who exploit our workforce, undermine our economy, and violate federal laws will be held accountable,โ€ the Department of Homeland Security said in a statement.

A search warrant filed Tuesday in the Southern District of Georgia reveals that officials sought records related to โ€œviolations of conspiracy to conceal, harbor or shieldโ€ people in the US illegally. The sought-after records included employment and recruitment records, correspondence with federal officials and identification and immigration documents. The warrant also identified four people specifically to be searched.

While the raid is part of an ongoing investigation, โ€œNo charges have been filed, so that means that no wrongdoing is being accused at this time,โ€ Schrank said.

Worker describes raid as a โ€˜war zoneโ€™

Federal agents descended on the Hyundai site like it was a โ€œwar zone,โ€ a construction worker at the electric car plant told CNN Friday.

The worker, who asked not to be named to protect his privacy, said he was part of the first group of people rounded up by federal agents.

โ€œThey just told everybody to get on the wall. We stood there for about an hour and were then taken to another section where we waited. Then we went in another building and got processed,โ€ the employee said.

Agents asked each worker for their Social Security number, date of birth and other identifying information, the employee said. Workers who were cleared were then given a piece of paper stating โ€œclear to departโ€ to show agents at the gate when leaving the plant.

Another worker told CNN affiliate Univision he hid in an air duct to evade capture.

โ€œEveryone came out running and told us immigration has arrived,โ€ the unidentified man said. โ€œWe hid ourselves in an air duct and it was really hot.โ€

GOP governor promoted the Metaplant

Republican Gov. Brian Kemp hasย touted the Hyundai Metaplantย as a boon for the Georgia economy.

In 2022, Hyundai announced an agreement with the state of Georgia to build Hyundaiโ€™s โ€œfirst dedicated fully electrified vehicle and battery manufacturing facilities in the United Statesโ€ in Bryan County,ย the company said.

The Metaplant was expected to create 8,500 jobs.

โ€œWith the first 500 employees trained, and more soon to join them, this is another major milestone as we continue our momentum towards the full opening of the Hyundai Metaplant!โ€ย Kemp postedย on social media last year.

Kempโ€™s office issued a statement Friday in response to the raid.

โ€œIn Georgia, we will always enforce the law, including all state and federal immigration laws,โ€ a Kemp spokesperson said. โ€œThe Department of Public Safety coordinated with ICE to provide all necessary support for this operation, the latest in a long line of cooperation and partnership between state law enforcement and federal immigration enforcement.โ€

South Korea says itโ€™s concerned

In a televised statement Friday, a spokesperson for Koreaโ€™s Foreign Ministry said โ€œmany of our nationals were detainedโ€ in the raid, according to a translation from Reuters.

โ€œThe economic activities of our companies investing in the United States and the interests of our citizens must not be unduly violated during the course of US law enforcement,โ€ spokesperson Lee Jae-woong said.

โ€œIn Seoul, we also conveyed our concerns and regret through the US Embassy today, urging special attention to ensure that the legitimate rights and interests of our citizens are not violated.โ€

CNN has reached out to the South Korean consulate in Atlanta and the embassy in Washington, DC for comment.

Georgia immigration attorney Charles Kuck told CNN two of his clients were detained at the raid after having arrived from South Korea under a visa waiver program that allows them to travel for tourism or business for up to 90 days.

One client arrived in the US last week, and the other arrived several weeks ago, he said.

โ€œThey were authorized to work in the US under a visa waiver,โ€ Kuck said. โ€œEach was pursuing activities consistent with the visa waiver program.โ€

The clients, both engineers, came to the US โ€œto advise briefly on the workโ€ and were planning to return to South Korea shortly, according to Kuck.

โ€œThis trip was actually part of their assigned duties abroad,โ€ Kuck said.

James Rim, president of the Korean American Association of Southeast Georgia, said many of the Koreans working at the site are skilled construction workers or technicians.

โ€œWe just want โ€ฆ to make sure they are legally handled right โ€ฆ to make sure they are respected,โ€ Rim told CNN.

Dozens apprehended in New York, too

On the same day as the Georgia raid, dozens of workers at a family-owned plant that makes nutrition bars were also apprehended during an ICE raid, officials said.

Federal agents arrived at the Nutrition Bar Confectioners plant in Cato and questioned โ€œvirtually the entire workforce,โ€ according to Rural & Migrant Ministry, whose staff witnessed the raid.

The groupย posted a videoย on its Facebook page showing law enforcement leading people into a van marked โ€œBorder Patrol.โ€ During the raid, workers were taken into the kitchen area of the plant and โ€œquestioned one by one over the course of many hours,โ€ the group said in the post.

โ€œAll the people were scared,โ€ a legal resident working at the plant who asked not to be identified for fear of reprisal told CNN in Spanish.

Some workers were screaming and crying as the agents โ€œbehaved aggressively with the menโ€ and โ€œpushed the women away,โ€ he said.

The group estimates that โ€œupwards of 70 employeesโ€ were questioned and โ€œnearly allโ€ were then arrested and taken to the nearby Oswego Detention Center. A spokesperson for the group told CNN theyโ€™re still waiting to hear from authorities about exactly how many were detained.

New York Gov. Kathy Hochul condemned the ICE operation in her state.

โ€œI am outraged by this morningโ€™s ICE raids in Cato and Fulton, where more than 40 adults were seized โ€” including parents of at least a dozen children at risk of returning from school to an empty house,โ€ Hochul said in a statement.

Hochul said such operations โ€œwill not make New York saferโ€ and will โ€œshatter hard-working families who are simply trying to build a life here.โ€

Daniela Mendez, who said her aunt was among those detained, protested the action, tellingย CNN affiliate WSTM: โ€œItโ€™s sad to see your community being put through fear, being terrorized, being broken apart from their families, from their children. Itโ€™s unfair. Itโ€™s unjust and it is racism.โ€

ICE confirmed to WSTM that it carried out a โ€œcourt-authorized enforcement actionโ€ in Cato. Employees told WSTM that around 60 workers were detained. CNN has reached out to the agency for further details.

Mark Schmidt, the owner of Nutrition Bar Confectioners, told theย New York Timesย that all his workers had legal documentation to work in the US. โ€œWeโ€™ve done everything we can to vet people we hire,โ€ he said.

Schmidt described the ICE raid as โ€œoverkill.โ€ His son Lenny Schmidt, the companyโ€™s vice president, told the Times the scene was โ€œalmost theatrical,โ€ describing police dogs and all-terrain vehicles involved in the operation.

โ€œIt could have been handled so much more humanely and decently,โ€ he said. โ€œThis kind of raid, you feel like itโ€™s a drug bust or a human trafficking situation.โ€

CNN has reached out to the company for further comment.

The New York and Georgia raids come as Chicago leaders areย preparingย for a possible National Guard deployment in step with anย expected immigration enforcementย operation in the city.

John Sandweg, former acting director of ICE, told CNN federal agents are focusing on immigration raids rather than criminal operations.

โ€œTo date, in LA and DC, what weโ€™ve seen them arrest are your run-of-the-mill economic migrants โ€ฆ not those gang members, not those convicted felons who pose a threat to the US,โ€ Sandweg said.

CNNโ€™s Dalia Faheid, Caroll Alvarado, Uriel Blanco, Maria Santana, Priscilla Alvarez, Max Saltman and Catherine E. Shoichet contributed to this report.