Ukraine and Russia say air raid alert apps were targeted in cyberattacks. Kyiv said the war’s longest truce, restricted to Ukraine’s eastern Kherson region, ended on Sunday after Russia rejected an extension.
Russia and Ukraine accused each other of cyberattacks on Monday. Moscow reported that its emergency alerts app had been hacked hours after Kyiv said its air-raid warning system was compromised. The incidents came as a fragile ceasefire in Ukraine’s Kherson region expired, prompting fears of renewed fighting.

Ukraine and Russia say their emergency alert apps were cyber-attacked, sending users fake warnings. Ukraine's air force said Kyiv was briefly under a radiation threat. Hours later, Russian authorities said their app had been hacked, with a Ukrainian espionage group reportedly sending false warnings of nuclear strikes inside Russia.

Officials in Ukraine and Russia said apps used to send public emergency alerts were hacked. Volodymyr Zelenskyy said Ukraine would halt strikes on Russian refineries if the United States supplied Patriot missiles. Ukraine’s air force reported fake alerts, while Russia’s Emergencies Ministry said its app faced a massive cyberattack.

Emergency alert apps in Russia and Ukraine were hit by cyberattacks following the end of a truce in Kherson.
Ukraine’s Air Force said its air raid alert app sent erroneous warnings after allegedly being hacked by Russia. Fake alerts about nuclear and chemical threats, street combat and the deployment of Russia’s Oreshnik missile were sent around Kyiv. Russia’s Emergencies Ministry later said its own app had suffered a “massive cyberattack” that spread “false information.”

Ukraine's air force said on Sunday that the country's nationwide air raid alert app may have been hacked, warning that its threat notifications no longer matched conditions on the ground. The suspected interference occurred just minutes after a local ceasefire with Russia in eastern Kherson ended.

Ukraine officials said the official air-raid alert app was likely hacked after it sent false radiation and chemical attack warnings in Kyiv on Sunday, telling residents to stay indoors. The Air Force said there was no radiation threat, while Ukraine’s Center for Strategic Communications blamed Russia; no group had claimed responsibility.

















