Hackers turned supermarket refrigerators into furnaces across hundreds of French stores, spoiling stock and sparking fires at chains including Carrefour, Monoprix, E. Leclerc and Coopérative U. Paris

What happened: A cyberattack in France heated refrigerators at hundreds of grocery stores across at least five chains, including Carrefour, Monoprix, Les Mousquetaires, E. Leclerc and Coopérative U, forcing disposal of temperature-sensitive food. Key numbers: Carrefour about 80 stores affected. Why it matters: Intermarche CEO Thierry Cotillard said the attack likely caused losses of tens of millions of euros nationwide in a single day. The Paris prosecutor called it large-scale, and EU Commissioner Christophe Hansen condemned it as a blow to European food safety. Coverage: 7 outlets in 24h

A cyberattack in France heated refrigerators at hundreds of grocery stores across at least five chains, including Carrefour, Monoprix, Les Mousquetaires, E. Leclerc and Coopérative U, forcing disposal of temperature-sensitive food.

Intermarche CEO Thierry Cotillard said the attack likely caused losses of tens of millions of euros nationwide in a single day. The Paris prosecutor called it large-scale, and EU Commissioner Christophe Hansen condemned it as a blow to European food safety.