Ukraine's emergency alert app erroneously issued nationwide air raid warnings, along with alerts for radiological and chemical threats, and street fighting in Kyiv on Sunday evening. Russia subsequently reported that its equivalent app also broadcast false alerts.
Both nations have stated their respective alert systems were compromised by cyberattacks. It remains unclear who is responsible for the breaches or if the two incidents are connected, according to the BBC.
Details regarding the specific nature of the hacks and the extent of the disruption are still emerging.