(The Center Square) – A week after the largest immigration operation in the history of Homeland Security took place in at Hyundai-LG Battery plant in south Georgia, more than 300 of those detained are on their way back to South Korea.

The Sept. 4 operation netted 475 arrests, most of them South Koreans, authorities said in a news conference.

A Korean Air plane was at Atlanta's Hartsfield-Jackson International Airport awaiting 316 of the detainees, according to CBS News. The network also reported that the detainees were loaded onto buses to make the journey to the airport. The flight reportedly left Atlanta on Thursday morning.

Authorities have not said much about the operation since a news conference last week.

"As we had determined through our investigation in advance and certainl

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