PARIS — French Minister of Foreign Affairs Jean-Noël Barrot said Iran was behind the recent series of “unprecedented” cyberattacks on refrigerators in several major supermarket chains in the country last month.

“Thanks to the outstanding work of the government departments, I am able to confirm that responsibility for this attack lies with the Iranian Revolutionary Guards,” Barrot told reporters Monday at a G7 meeting in Paris. “We will impose sanctions at European level against those responsible.”

Barrot said that 700 food distribution sites in France were impacted in the cyberattack. French prosecutors said shortly after that they were opening an investigation into the hacks.

Though Barrot was only referring to the incidents reported in France, grocery stores across Europe and even French blood banks have been targeted by hackers in recent days. Cyber experts had previously raised concerns that the attacks may have been part of Russia’s ongoing hybrid warfare against Europe, though the Kremlin has denied any involvement.

This developing story is being updated.