France has vowed a tough response after blaming Iran for a cyberattack on supermarket refrigeration systems. The unprecedented sabotage has prompted an investigation, proposed EU sanctions and possible undisclosed measures.

Supermarket refrigeration systems in at least seven European countries have been affected by suspected cyberattacks that caused refrigerator and freezer temperatures to rise and food to spoil, while Belgian prosecutors have opened a criminal investigation into the incidents, according to reports by DW, Euronews and Reuters. Stores in Belgium, Sweden, Estonia, the Netherlands, Luxembourg, Ireland and Finland have reported problems similar to an attack in France on October 12, when hundreds of supermarkets belonging to the Intermarché and Coopérative U chains were targeted.

Supermarkets in Sweden, Belgium, Luxembourg, Ireland and Estonia were hit Monday by problems with freezers and fridges that apparently were caused by cyberattacks

Supermarkets in Sweden, Belgium, Luxembourg, Ireland and Estonia reported disruptions to their refrigeration systems, apparently caused by cyberattacks.