Fake nuclear warnings issued after Ukrainian and Russian air alert apps hacked

What happened: Ukraine and Russia both said their air alert apps were hacked on Sunday night, sending fake warnings of attacks, including nuclear, to users. Ukraine temporarily disabled its app for maintenance. Key numbers: Alerts were sent on Sunday night; Russia said full functionality would be restored by the end of the day on Monday; Russia launched a Why it matters: Ukrainian officials said the attack caused no panic, noting the messages were in Russian. Stanford's Herbert Lin said it was the first such incident on an official Ukrainian information app but likely not the last.

Ukraine and Russia both said their air alert apps were hacked on Sunday night, sending fake warnings of attacks, including nuclear, to users. Ukraine temporarily disabled its app for maintenance.

Ukrainian officials said the attack caused no panic, noting the messages were in Russian. Stanford's Herbert Lin said it was the first such incident on an official Ukrainian information app but likely not the last.