Hackers raised the temperatures of refrigerators and freezers in hundreds of French stores to 50 degrees Celsius during the night, causing fires and food spoilage.

The Paris public prosecutor's office explained on Monday that a large-scale attack targeted internet-connected refrigerators in several major food chains across France, leading to food loss and fires.

Reuters quoted a source at the French Prime Minister's office saying that guidelines were issued to the French National Cybersecurity Agency to conduct an investigation on the matter.