India, Nov. 2 -- Supermarkets across several European countries on Monday reported cyberattacks on their refrigeration systems, causing temperatures in refrigerators and freezers to rise sharply and leaving stores with spoiled food.

The incidents affected outlets in Ireland, Sweden, Belgium, Luxembourg, Estonia and Finland. This comes less than three weeks after a similar cyberattack hit hundreds of supermarkets in France which forced retailers to discard large quantities of chilled and frozen products, AFP reported.

No group has claimed responsibility for either wave of attacks.

Ireland's third-largest supermarket chain, SuperValu, confirmed that refrigeration systems in 13 of its 223 stores had been affected by a cyber incident, as p...