South Korea has levied a record $409 million fine on e-commerce giant Coupang following a data leak affecting over 30 million customers. The probe into the US-incorporated company's data breach has caused friction between Seoul and Washington.

South Korea imposed on Thursday a record US$409 million fine on e-commerce giant Coupang over a leak that exposed the data of more than 30 million customers, provoking ire from US lawmakers. The move caps a months-long probe into the country’s largest online retail platform, which is incorporated in the United States. Allegations of a massive data leak first surfaced in November, becoming an unexpected source of friction between Seoul and Washington. “We have decided to impose a total of 624.68....