Air raid alert declared throughout Ukraine due to MiG-31K takeoff in Russia (updated)

On the evening of March 6, an air raid alert was sounded throughout Ukraine due to the takeoff of a MiG-31K in the Russian Federation.
This was reported by Censor.NET with reference to the Air Force of the Armed Forces of Ukraine.
"Attention! Missile danger throughout Ukraine! MiG-31K is taking off.
Do not ignore the air raid alert!" - the Air Force reported.
Twenty minutes later, all-clear signal was given.