Prosecutors on Thursday filed for arrest warrants for three officials at a burger patty supplier of McDonald's Korea.
 
The three executives who were not named were charged with violating the law regarding safety and hygiene control over livestock products.
 
The Seoul Central District Prosecutor's Office said they overlooked a hygiene test for patties that may be vulnerable to a type of bacteria known to cause acute kidney failure called hemolytic uremic syndrome.
 
Earlier last month, prosecutors had raided the McDonald's headquarters and four suppliers to confiscate documents.
 
Prosecutors have been investigating the local unit of the U.S. fast food restaurant after a five-year-old girl fell ill after eating an undercooked McDonald's burger earlier this year.