President Lee Jae-myung warns raids could see South Korean companies ‘hesitate’ to make bigger investments in the US.Hundreds of South Koreans arrested in a huge immigration raid in the United States are being released to begin the journey home, Seoul said, after warning the “bewildering” episode may have a negative effect on future investment.South Korea’s President Lee Jae-myung said on Thursday that Korean companies will likely hesitate to make further investments in the US unless Washington improves its visa system for their employees.Recommended Stories list of 3 itemsend of listThis comes after a September 4 immigration raid resulted in the arrest of South Korean workers at a battery factory under construction at Hyundai’s sprawling auto plant west of Savannah.“When you build a facility or install equipment at a plant, you need technicians, but the United States doesn’t have that workforce and yet they won’t issue visas to let our people stay and do the work,” Lee said during a news conference on Thursday marking his 100th day in office.South Korea’s Ministry of Foreign Affairs said on Thursday that US authorities have released the 330 detainees – 316 of them Koreans – and they were being transported by buses to Atlanta’s Hartsfield-Jackson airport, where they will board a charter flight scheduled to arrive in South Korea on Friday.The group also includes 10 Chinese, three Japanese and one Indonesian national. South Korean President Lee Jae-myung [File: Kim Min-Hee AFP]During Lee’s news conference, he …