SEOUL: Hundreds of South Korean workers were headed back to Seoul on Friday after their detention in a US immigration raid that Hyundai warned will delay completion of its battery factory. South Korean workers accounted for most of the 475 people arrested last week at the Hyundai-LG battery plant under construction in Georgia, prompting tense negotiations between Seoul and Washington, staunch security allies.

A chartered plane will ferry hundreds of South Koreans home from Atlanta after they were detained for illegally working at a Hyundai electric battery plant.

South Korean workers detained in an immigration raid last week in the U.S. state of Georgia will depart from the U.S. around 1430 local time on Wednesday.