Ukraine’s Air Alert App Sent False Radiation Warnings After Apparent Hack, Officials Say

False warnings hit Ukraine’s alert app

Developing story · Updated November 2, 2026, 12:14 AM Central

Ukraine’s Air Force said the country’s Air Alert app was likely subjected to hostile interference after users received false warnings of radiation, a chemical threat and street fighting in Kyiv late Sunday.

There was no radiation threat associated with those messages, the Air Force said, according to the BBC and The Kyiv Independent. Ukrainian officials urged people to follow official information and continue paying attention to legitimate air-raid alerts.

The false messages hit a system that millions rely on during Russia’s full-scale war against Ukraine. A bogus radiation alert can create panic; the equally dangerous mistake would be assuming that every later air-raid warning is false.

What appeared on phones

The BBC reported that the first of the false Kyiv messages appeared around 10:47 p.m. local time November 1, followed within minutes by false chemical and street-fighting alerts. The Kyiv Independent said its journalists received the messages, and that sirens also sounded in several regions.

Ukraine’s Air Force said the app was likely compromised and denied a radiation threat. A Vinnytsia regional official warned people not to follow links included in suspicious messages, according to the Kyiv Independent.

The messages’ appearance does not establish who carried out the intrusion. Some Ukrainian officials blamed hostile actors; that attribution has not been independently established in the sources cited here.

What officials said about restoration

By around midnight Kyiv time, Ukraine’s State Emergency Service said the nationwide alert system had returned to normal and urged people to follow local authorities and audible warning signals, the Kyiv Independent reported. Around 2 a.m. November 2, the app’s channel said service was gradually being restored while the display of targets remained temporarily suspended.

The app’s team said it was adding security measures. Its statement said the app did not store or use personal data; Newstro has not independently audited that claim.

For current local safety information, follow the Air Force’s official communications and Ukraine’s emergency service. A false notification in this incident is not a blanket cancellation of future warnings.

A separate Russian alert-app claim

Hours later, Russia’s emergency ministry said its own app was hit by a cyberattack and circulated false information, the BBC reported. A Ukrainian partisan group claimed involvement in that separate incident. The BBC said a purported screenshot shared by the group had not been verified. The two episodes’ relationship has not been independently established.

Timeline of the alerts

Times are local to Kyiv; Ukraine was on Eastern European Time, UTC+2.

About 10:47 p.m., November 1False radiation and other warnings began appearing, the BBC reported.
About 11:53 p.m.All-clear messages followed the false Kyiv alerts, according to the BBC.
Around midnightThe emergency service said the nationwide alert system was operating normally, the Kyiv Independent reported.
Around 2 a.m., November 2The app’s channel said its operations were gradually being restored; target displays remained suspended.