They were among nearly 500 workers apprehended at a construction site for a South Korean battery maker, officials said. The episode prompted diplomatic concern in Seoul.
A Homeland Security official said 475 people, most of whom are South Korean citizens, were arrested at a construction site in Ellabell, Ga., on Friday.
Former Vice President Kamala Harris’s Secret Service protection would have ended in July, but President Joseph R. Biden Jr. had signed an order extending it for another year.
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