South Korea's foreign minister may visit the United States to respond to a raid on a Huyndai plant in Georgia that detained 475 people, most of them South Korean nationals.

Cho Hyun said Seoul was considering an imminent visit to discuss the arrests on behalf of President Lee Jae Myung, who was all smiles with Donald Trump at a White House meeting two weeks ago.

'We are deeply concerned and feel a heavy sense of responsibility over the arrests of our nationals,' Cho said at an emergency meeting Saturday, according to Yonhap News Agency.

Cho confirmed that approximately 300 of the 475 arrested were South Korean nationals, with photos showing some of those arrested being put in chains.

'We are deeply concerned and feel a heavy sense of responsibility over the arrests of our nationals,' he said.