France has blamed Iran for a cyberattack on supermarket freezers and refrigerators. The attacks happened last month. They hit around 700 stores. Hackers took control of the cooling systems in the fridges and freezers. Temperatures went up to more than 50 degrees Celsius. Huge amounts of frozen food melted. Stores had to throw it away because it was not safe to eat. France said the attack was on a level never seen before. France believes an Iranian cyber unit carried out the attack. Iran said it didn't do the attacks. It blamed the French government for them.

Security experts warned that cyberattacks could be more dangerous in the future. They could hit other things. A French blood bank has also been hit. A French cybersecurity expert said that at the moment, hackers are attacking easy-to-access things. He said there could be attacks on other things. Hackers could attack services like water and electricity. They could also attack hospitals, airports, public transport and banks. This can put people's lives in danger. Leaders in Europe have said countries need to make their cybersecurity stronger.