American investigators are working with French police on refrigerator outages in Europe amid unexplained failures at US military bases.
The collaboration follows suspected sabotage at French supermarkets earlier this month, when hackers allegedly raised fridge and freezer temperatures to 50C (122F).
About 700 supermarkets were targeted, spoiling thousands of tons of food, with extreme heat triggering fires and sprinkler systems in some cases, causing further damage.
