Cyber hackers have targeted fridges and freezers in supermarkets in several European countries including Ireland – causing temperatures to increase and food to spoil.
Ireland's third-largest supermarket chain, SuperValu, said its refrigeration systems limited to a specific model in 13 of its 223 stores had been affected by a cyber incident.
Chilled and frozen products have been removed from sale, it added.
Sweden's cyber security centre said it was responding to several incidents in ICA and Coop grocery stores, that had caused freezer temperatures to rise sharply overnight on Monday.
Meanwhile, fridges and freezers in dozens of stores across Belgium and Luxembourg operated by Ahold Delhaize were also hit by a cyberattack, the Belga news agency reported.
Five Spar stores operated under the Colruyt Group in Belgium also had their fridge systems attacked.
An unspecified supermarket chain in Estonia was also affected, with temperatures set to 50C, technology supplier Kitman Coldtech told public broadcaster ERR.
The incidents come less than a month after a similar attack impacted hundreds of supermarkets in France, during which temperatures in some fridges rose to 50C and sparked fires.
Les Mousquetaires, which owns retailer Intermarche, said that approximately 150 of its stores were affected, with the retail group forced to dispose of all the food.
Last month, Monoprix said that about 5% of its 490 French stores, and Ahold Delhaize also took several systems offline as it contended with a "security issue" in its network.
On Monday, one Swedish store said in a social media post that the temperature of its refrigerators and freezers had been set to 50C - reminiscent of the incident in France.
At an ICA Baronen store in Stockholm, a notice said all the shop's freezers were broken due to a cyber attack.
The store's sales manager said the attack occurred at 2am local time and was first noticed at 5.30am.
"We are aware that a limited number of stores were affected by an incident overnight, which impacted their refrigeration and freezer systems," a spokesperson from ICA said.
Co-Op told Swedish daily newspaper Aftonbladet that six of its stores had been affected by similar incidents.
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The retailer did not immediately respond to a request for comment.
Sweden's national cyber security centre head John Billow said the agency was investigating the latest incidents.
"We have in recent weeks... identified that we have quite a lot of exposed operational technology devices in Sweden that we have been clear about the necessity to update or patch," he said.
The CEO of Belgian refrigeration company Sabcobel, Stephan Moelans, which operates Delhaize's systems, confirmed the incident was a cyber attack.
He said the incident unfolded when the units' evaporators were switched to defrost mode.
Advances in technology have meant that devices ranging from refrigerators to heating systems that were manual, can now be controlled and monitored remotely.
This has created new opportunities for cyber criminals
Authorities have not indicated who could have been behind last month's incidents.
There were no claims of responsibility so far.
(c) Sky News 2026: Hackers target refrigerators in Ireland and European countries in new wave of cyber attacks
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