In brief
On Sunday, Ukraine’s official air‑raid alert app triggered nationwide sirens with claims of nuclear, chemical, and hypersonic missile threats after alleged hacking by Russian actors. Ukrainian authorities denied any real danger, while Russia’s Emergencies Ministry confirmed a massive cyber‑attack. The incident followed a recent ceasefire in Kherson and underscores the continuing cyber and informational warfare surrounding the conflict.
On Sunday, a Ukrainian smartphone app that alerts citizens to incoming air attacks sent out a wave of false messages, warning that nuclear and chemical weapons were targeting parts of the country and that Russia’s new hypersonic Oreshnik missile had been deployed. The alerts were dispatched to the same device that signals residents to take shelter, setting off sirens across cities from Kyiv to Dnipro.
The app, known as Air Alert, is used nationwide to deliver real‑time warnings of Russian bombing or missile strikes. In Kyiv the city’s own alert service continued to work normally, but the national system sent the erroneous messages to millions of phones. Screenshots that spread on social media showed maps with red radiation symbols and text outlining the false dangers.
Ukrainian Air Force posted on its Telegram channel that the app was “probably hacked” and that the signals were “error messages.” The post read, “There is no radiation threat! Stay calm and follow our updates on our channel!” The statement came just hours after the false warnings were released.
SPRAVDI, the Centre for Strategic Communications, accused Russia of the hacking. In a tweet on X, the organization said the app “appears to have been subjected to enemy influence.” The claim was repeated in Al Jazeera’s coverage of the incident.
United Press International reported that the false alerts triggered nationwide sirens, scaring residents and disrupting daily life. The agency noted that the false radiation and chemical warnings began amid a “wave of Russian missile and drone attacks on energy infrastructure” that had left hundreds of thousands of Ukrainians without power. President Volodymyr Zelensky had earlier mentioned these attacks in a social‑media statement.
Russia’s Ministry of Emergencies confirmed that its own mobile app had been hit by a “massive cyberattack.” The ministry said on its Telegram channel that the attack had “led to the spread of false information.” The statement was issued early Monday morning, a few hours after Kyiv’s alerts had already caused public alarm.
Background
The hacking and false warning episode unfolded just after a localised ceasefire in Kherson ended on Sunday. The truce, said to be the longest of the war, had begun that Tuesday. Analysts say the incident highlights the growing role of cyber and information operations in the conflict. Both sides have previously claimed responsibility for disrupting each other’s communication networks and civilian warning systems.
By nightfall, the Ukrainian State Emergency Service issued an all‑clear at midnight, stating that the national warning system had returned to normal operation. Officials urged citizens to remain vigilant but not to respond to unverified alerts or clicks on third‑party links. The incident underscores the challenges of maintaining public trust in digital warning tools amid ongoing hostilities.
