What we know about the alert app hack in Ukraine and Russia

What we know regarding the alert app hack in Ukraine and Russia.

What happened

As well as alerts for a radiological threat, a chemical attack and street fighting in Kyiv on Sunday evening – all of which turned out to false, ukraine's emergency alert app issued a nationwide air raid warning.

For context, a few hours afterwards, Russia stated its equivalent app had additionally issued false alerts, with both countries claiming their systems had been hacked.

It is still unclear who is to blame for the cyber-attacks and whether the two incidents are connected – the BBC's cyber correspondent Joe Tidy explains what we know so far.

The bottom line

In short, what we know about the alert app hack in Ukraine and Russia is the central thread here, and readers can expect follow-up reporting as the picture becomes clearer.