Ukraine's official air-raid alert application was compromised, broadcasting false warnings of a "radiation hazard" and a "chemical attack alert" in Kyiv on Sunday, prompting officials to attribute the cyberattack to Russia.
Residents received alerts urging them not to leave their homes. The app also issued erroneous notifications about Russia's hypersonic Oreshnik missile and alleged street fighting within the capital. Loudspeakers in Kyiv reportedly broadcast a recorded message instructing citizens to take protective measures.
The Ukrainian Air Force confirmed the app had been "subjected to enemy influence" and assured the public that there was "no radiation threat." The Center for Strategic Communications in Ukraine pointed to Russia as the source of the disruption, though no group has claimed responsibility.
Separately, Russia's Emergencies Ministry reported that its own mobile application was targeted by a "massive cyberattack," allowing attackers to disseminate false information. The ministry stated on Telegram that the breach enabled the distribution of misleading public announcements.