Authorities in Ukraine and Russia said cyberattacks targeted their emergency-alert apps late Sunday. Ukrainian users received false warnings of nuclear, radiation and chemical threats and street fighting; Ukraine said its app was restored after a suspension, while Russian officials said efforts to restore their app were ongoing. Neither government confirmed who was responsible.
Reporting from 17 identified publishers across this event arc.
These publishers contributed reporting to the broader event history. Not every source addresses the specific development described above.
How this brief is built: The BriefBrief correlates multiple sources into one evolving event brief, updated as new facts emerge.
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