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Cyberattack hits emergency-alert apps in Ukraine and Russia: fake nuclear warning in Kyiv

On Sunday both countries' emergency-alert mobile apps were hit by cyberattacks; users in Ukraine received a false warning of a nuclear radiation danger in Kyiv, while Russia said its ministry app had been breached.

2 November 2026 · 1 min read · California Uzbek

According to France 24 and the BBC, on Sunday evening the emergency-alert mobile apps of both Ukraine and Russia were hit by cyberattacks. Both countries confirmed that false messages had been sent to users through the apps.

False nuclear warning in Kyiv

In Ukraine, users received a false alert claiming there was a high nuclear radiation danger in the capital, Kyiv. The message was untrue and was treated as disinformation that could cause panic.

Russia's ministry app

Russia's Emergency Situations Ministry said hackers had gained access to the ministry's mobile app and sent fake emergency alerts, adding that efforts were under way to restore the app's functionality.

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Source of the attack unknown

So far it is not known exactly who or which group carried out the attack; neither government has formally attributed responsibility. According to the Guardian, the incident coincided with Russia resuming attacks on the city of Kherson.

Why it matters

Attacks on emergency-alert systems can cause fear and confusion among the public and erode trust in official warnings. The incident points to rising tension in the information and cyber arena amid the war.

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