In Ukraine, false warnings about radiation, nuclear incidents and chemical attacks appeared through emergency-alert channels, including on phones in Kyiv. Similar messages were also broadcast through Kyiv loudspeakers. The Ukrainian air-raid alert application was reportedly compromised or likely hacked, although the supplied reports do not specify how the system was breached.
The Ukrainian Air Force said the Air Alert application had likely been compromised, warned that there was no radiation threat and urged residents to remain calm, according to the Times of India. Ukraine’s Ministry of Digital Transformation later said the nationwide alert system was operating normally, indicating a distinction between the affected application and the broader warning network.
Russia’s emergency-alert infrastructure was also targeted. Its Ministry of Emergency Situations said a massive cyberattack on its mobile application allowed attackers to distribute false public-safety information, while Russian authorities reported false warnings about nuclear strikes inside the country. The available evidence confirms the Russian system was targeted, but it does not establish that nuclear warnings reached Russian users in the same form as the radiation alerts reported in Kyiv.
La Repubblica reported that false messages reached Moscow approximately three hours after the Ukrainian alerts. That interval is supported by a single source, and the supplied material does not specify the content of every message sent in Moscow. The broader account from the three publications is that emergency-warning systems in both countries were affected by reported or apparent cyber intrusions.
Responsibility remains unresolved. The Times of India reported that Russian authorities reportedly suspected a Ukrainian espionage group in connection with the Russian incident, but the supplied evidence does not establish that attribution. Nor does it identify the technical method used to compromise either alert system. What is established is the geographic scope of the disruption: the incidents affected emergency-warning channels in both Ukraine and Russia, rather than being confined to one country.