Hundreds of workers at a Hyundai Motor car battery facility under construction in the US state of Georgia have been detained in a raid by authorities, stopping work on a plant that is one of the Korean automaker's major investments in the US.

About 475 workers were arrested, most of whom are South Korean nationals according to US immigration officials, in the largest single-site enforcement operation in the Department of Homeland Security's history.

President Donald Trump's administration has been escalating a crackdown on immigrants, disrupting businesses around the country even as the White House encourages more inflows from foreign investors.

The arrests could exacerbate tensions between Washington and Seoul, a key ally and investor in the US. The countries have been at odds over the

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