French officials on Monday accused Iran’s Revolutionary Guard of responsibility over cyberattacks that knocked out commercial refrigerators and freezers across France last month, saying there would be consequences for Tehran.

The hacks that struck hundreds of French supermarkets in early October were among the most disruptive cyberattacks of the Iran war that began in February, a conflict that has been marked by scattered incidents of alleged digital disruption. These have included hacks against the Los Angeles transit system in March, against U.S. water treatment plants in July and against ships bound for the United States in August.

Iran’s mission to the United Nations did not return messages seeking comment. Iran routinely denies carrying out malicious cyber operations.