Credit Mutuel Arkea hit by cyberattack with about €100 million in fraudulent transfers

▲ Escalating

Hackers raise temperatures at three French blood-product cold stores

France's national blood service says hackers accessed control systems and raised temperature and defrosting thresholds at three cold stores holding blood products. Alarms let technicians intervene before products were compromised. On Monday, supermarket chains in Sweden, Belgium and Luxembourg reported rising fridge and freezer temperatures in dozens of stores overnight.

• The blood service attack is described as an apparent escalation of recent cyber-attacks on refrigeration across Europe.
• Coop says six of its Swedish stores were affected.
• The supermarket incident resembles an October hack that caused millions of euros in food losses at French stores.