An air-raid warning has been issued throughout Ukraine due to MiG-31 fighter jets taking off. Explosions have rocked the cities of Kropyvnytskyi and Kryvyi Rih. Source: alert map; Ukrainian Air Force; Suspilne, a Ukrainian public broadcaster Quote from Air Force: "Several MiG-31Ks of the Russian Aerospace Forces have taken off from the Mozdok airfield.