Prosecutors searched McDonald's headquarters in Seoul and its supplier companies, Wednesday, as part of an ongoing investigation into allegations it served undercooked burger patties to children.
According to the Seoul Central District Prosecutors' Office, prosecutors searched the Seoul office and three of its supplier companies to confiscate evidence.
The probe was launched after a woman filed a lawsuit against the company, claiming her five-year-old daughter came down with an illness after eating a Happy Meal burger containing undercooked meat. Her daughter, who was healthy prior to eating the meal, now has to receive dialysis for 10 hours every day for her damaged kidneys.
The franchise came under fire earlier this year when a thread of complaints surfaced about uncooked meat which allegedly caused hemolytic uremic syndrome and other viruses for some consumers.
One of the most controversial cases involves seven primary school students and their teacher who said they suffered from gastro enteritis after eating McDonald's bulgogi burgers in Jeonju, North Jolla Province.
The company's Managing Director Joh Ju-yeon expressed regret in a media statement last month and vowed to support the victims and better secure food safety of the company's products.