The organizing committee for the Pyeongchang Olympics has called in 900 military personnel after more than 1,200 private security workers were pulled off duty because of concerns about the spread of the Norovirus, Christophe Dubi, IOC executive director of the Olympic Games said Tuesday. In a statement, POCOG said that starting Sunday workers reported headaches, stomach pain and diarrhea. The Gangwon Province Health and Environment Research Center found 41 workers with symptoms that might be related to the virus. The others have been pulled from duty to prevent possible spreading of the illness.

The workers are largely responsible for checking credentials and screening baggage entering the venues. The military personnel were brought in from about 40 minutes away. According to the Centers for Disease Control and Prevention, Norovirus is considered highly contagious and typically includes symptoms of diarrhea, stomach pain, vomiting and nausea. The organizing committee said groundwater used in food and beverages at the Horeb Youth Centre — a housing facility — are suspected, and the cause is being investigated. READ MORE