The repatriation follows the death of a South Korean student who was reportedly forced to work in a scam centre in Cambodia.
His death triggered public outrage in South Korea, prompting the government to send a delegation to the Cambodian capital, Phnom Penh, for talks on joint responses.
Cambodian Interior Ministry spokesperson Touch Sokhak said 64 South Koreans are set to be repatriated from Cambodia late Friday.
South Korean national security director Wi Sung-lac earlier told a briefing in Seoul that the two countries were in the final stages of negotiations on the charter flight, with about 60 South Koreans due to leave Phnom Penh at around midnight local time.
Upon arrival, the South Koreans, who were previously detained amid crackdowns on scam centres in Cambodia, will face investigations, Wi said, an apparent bid to determine whether they willingly joined scam organisations or were forced to work after being drawn in via false job ads.
Scam centres in Cambodia are estimated to have about 200,000 workers, including 1000 South Koreans, according to South Korean officials.
Online scams have risen sharply since the COVID-19 pandemic and produced two sets of victims — those forced to work as scammers under the threat of violence, and the targets of their fraud via bogus investment pitches, illegal gambling schemes and even romantic ploys.
Monitoring groups say online scams earn international criminal gangs billions of dollars annually.
A South Korean travel ban came into effect on Thursday for parts of Cambodia, including Bokor Mountain in Kampot province, where the South Korean student was found dead.
South Korean President Lee Jae Myung on Friday ordered authorities to take urgent action to try to remove illegal advertisements for jobs not only in Cambodia but also across Southeast Asia.
Online scam centres were previously concentrated in Southeast Asian countries, including Cambodia and Myanmar, with most of the trafficked and other workers coming from Asia.
But an Interpol report in June said the past three years have seen victims trafficked to Southeast Asia from distant regions including South America, Western Europe and Eastern Africa and that new centres have been reported in the Middle East, West Africa and Central America.
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