UPDATE 1 — Investigators hunt French supermarket fridge hackers, no claim of responsibility
At least 350 supermarkets caught up in cyberattack, spoilt food disposed of Expert suggests attack exploited failure of 'basic cyber hygiene' Danish firm urges companies to use up-to-date systems (Adds update on Dutch disruption in paragraphs 2, 22-24, adds Dixell and Copeland firmware also impacted in paragraphs 7) By