On November 1, 2026, residents of Kyiv received false alerts via the 'Air Raid Alert' app, warning of nuclear and chemical threats. The Ministry of Internal Affairs and the Center for Countering Disinformation in Ukraine confirmed the alerts were false and suggested the app may have been hacked.

The Ukrainian Air Force indicated that the app likely experienced hostile interference. Some alerts were in Russian, raising suspicions among users. The Ukrainian government temporarily disabled the app for maintenance following the incident.

The false alerts in Ukraine were sent just minutes before a local ceasefire ended in the Kherson region. Ukrainian officials advised residents to verify alerts through official channels and remain calm.

On November 2, 2026, pro-Ukrainian hackers allegedly breached Russia's Emergency Situations Ministry app, sending fake messages about a nuclear threat. The Russian government confirmed the hack and the dissemination of false information.

The incidents are part of ongoing cyber warfare between Ukraine and Russia. The group ATESH claimed involvement in the hacking of Russia's emergency app.