A cyberattack targeting blood storage monitoring systems in France has heightened concerns over cybersecurity across Europe, following a series of hacking incidents and bomb threats that disrupted businesses and air travel across the continent.

The French Health Ministry disclosed that several regional facilities of the French Blood Establishment (EFS) were affected by the attack on Monday, compromising some systems responsible for monitoring and controlling cold storage rooms, The Independent reported.

However, the ministry confirmed that no blood products were damaged, attributing the preservation of supplies to existing monitoring and alarm systems, alongside precautionary measures introduced immediately after the incident. It added that the situation was under control, while investigations into the affected equipment continued.

The attack occurred amid similar incidents targeting refrigeration systems in supermarkets and food distribution facilities across eight European countries, forcing businesses to discard large quantities of fresh and frozen food after hackers allegedly manipulated temperature controls.

French cooperative bank Credit Mutuel Arkea also disclosed on Wednesday that it had suffered a cyberattack that enabled fraudulent transactions. However, the bank said customers’ funds were not affected and that the incident had been contained.

Separately, a series of bomb threats disrupted air travel across Europe on Tuesday, forcing at least seven flights to divert or undergo security searches. Flights departing from London, Manchester, Copenhagen, Israel, Dublin, Bergamo and Lisbon were among those affected, while an airport in Poland was temporarily shut down.

Ryanair confirmed that two of its flights from Dublin and Lisbon were searched following anonymous bomb threat reports, raising concerns about the ability of malicious actors to exploit security vulnerabilities and disrupt essential services.