In short:
Supermarket chains across Europe have reported an IT incident which led to changes in fridge and freezer temperatures.
asserted
which → report → temperatures
Believed to be a cyberattack, the incident has affected four supermarket chains.
asserted
incident → believe → chains
The head of Sweden's national cyber security centre said it had "become clear" how many operational technologies are exposed, and need to be protected.
asserted
technologies → say → centre
Four supermarket and grocery chains across Europe reported an IT incident impacting fridges and freezers overnight, with one company attributing the temperature spikes to a cyberattack.
Dutch supermarket chain Ahold Delhaize, and Belgian chain Colruyt said on Monday an IT incident overnight hit cold storage in dozens of stores in Belgium and Luxembourg, while Swedish grocers ICA and Coop reported similar temperature spikes.
asserted
ICA → report → spikes
The incidents follow an attack in France last month, in which police said hackers seized control of cooling units at hundreds of supermarkets, raising temperatures up to 50 degrees Celsius, causing fires and food losses.
asserted
hackers → follow → fires
Ahold Delhaize also reported a cybersecurity incident to Dutch police last month after it detected suspicious activity in its infrastructure.
asserted
it → report → infrastructure
On Monday, Ahold Delhaize realised there had also been temperature increases in the cooling systems, according to company spokesperson Sarah De Meester.
uncertain
Delhaize → realise → Meester
The company is investigating the incident.
asserted
company → investigate → incident
Stephan Moelans, the CEO of Belgian refrigeration company Sabcobel, which operates Ahold Delhaize's systems, told Belga news agency the incident was a cyber attack, in which the units' evaporators were switched to defrost mode.
asserted
evaporators → operate → mode
Mr Moelans' office declined to comment when contacted by Reuters.
asserted
office → decline → Reuters
A spokesperson for Colruyt Group, which operates Spar stores in Belgium under a franchise system, said the fridge system were attacked in five shops.
asserted
system → operate → shops
From refrigerators and heating systems to security cameras and alarm networks, an expanding range of devices once largely mechanical can now be monitored and controlled remotely, creating new opportunities for cybercriminals.
asserted
range → expand → cybercriminals
Authorities have not indicated who could have been behind last month's incidents, and there were no claims of responsibility.
uncertain
who → indicate → responsibility
The head of Sweden's national cybersecurity centre, John Billow, told Reuters it was working on several incidents regarding refrigeration systems in grocery stores around Sweden.
asserted
it → tell → Sweden
One Swedish ICA store said on social media the temperature of its refrigerators and freezers had been "hacked" overnight and set to 50 degrees.
asserted
temperature → say → degrees
At an ICA Baronen store in Stockholm, a notice said all the shop's freezers were broken due to a cyber attack.
asserted
freezers → say → attack
The store's sales manager said the attack happened at 2AM local time, and was noticed at 5.30AM.
asserted
attack → say → 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 for ICA said.
asserted
spokesperson → affect → ICA
Grocery retail group Coop told Swedish news outlets six of its stores had been affected by similar incidents.
asserted
six → tell → incidents
It did not immediately respond to a request for comment.
asserted
It → respond → comment
"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," Mr Billow said.
asserted
Billow → identify → necessity
An Estonian supermarket chain was also affected, with temperatures set to 50 degrees, technology supplier Kitman Coldtech told public broadcaster ERR.
asserted
Coldtech → affect → ERR
"This is very fresh, it happened this morning," Kitman CEO Jann Mutso told ERR.
asserted
Mutso → happen → ERR
He declined to name the affected grocery chain.
asserted
He → decline → chain