World
Europe on alert after supermarket freezers hit by cyber-attacks in 10 countries
Supermarkets have reported problems from Estonia and Sweden to Portugal and Italy and many retainers have been forced to discard food.
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World
What we know about the alert app hack in Ukraine and Russia
Both Ukraine and Russia say their air raid alert apps were cyber-attacked - Joe Tidy explains what we know so far.
World
Russia, Ukraine air raid alert apps hit by cyberattacks after truce ends
Ukrainian users receive fake warnings of nuclear threats, while Moscow reports 'false information' on its app.