Hackers attacked refrigerators in supermarkets in Belgium, Sweden and Estonia. In Delhaize, the incident caused refrigerator temperatures to rise in dozens of stores, company spokeswoman Sarah de Meester said in a statement. Now the retailer's experts are investigating the reasons for the failure. Sweden's ICA and LOL chains faced a similar problem, TV channel SVT reported. Shops were hit hardest in Skåne county, but the attack also affected Åland, Värmland and Stockholm. By morning the temperature in the freezers reached 50 degrees Celsius, which is why some of the food spoiled. The head of the Swedish National Center for Cyber Security, John Billo, clarified that work is now underway to eliminate the consequences of the incident. The television and radio company Sagia also reported an attack on a large retail chain in Estonia. Hackers gained remote access to the computer used to control the store's cooling system and changed the temperature to +50 degrees Celsius.