Hackers send fake nuclear threat alert to Ukraine emergency app

1. What happened

   According to a Guardian headline, hackers sent a fake nuclear threat alert to a Ukrainian emergency app. Only the headline was available, so other details could not be checked.

2. When it started

   The date of the reported alert is unknown from the information provided.

3. How it spread

   The information provided does not say how the hackers gained access to the app or how the alert was sent.

4. Why it matters

   No motive, and no attribution to any individual or group, is stated in the information provided.