France accuses Iran of "thawing" its refrigerators.
In the last week, unknown hackers have been attacking supermarket chains and warehouses, causing refrigeration equipment to raise the temperature. The cost of spoiled products is estimated at hundreds of millions of euros.
The French foreign minister blamed the Islamic Revolutionary Guard Corps (IRGC) for the incidents.
"The Revolutionary Guards are responsible for this cyber attack - it will have consequences," said Jean-Noël Barre.