In the city of Dergachi, Kharkov region of Ukraine, an explosion was heard, said the head of the regional military administration Oleg Sinegubov.
At least two explosions occurred in Kharkov, according to the publication “Public”. In the Nikolaev region of Ukraine, several explosions were also heard, as reported by the same publication.
As of 03:55 Moscow time, an air alert was declared in Dnepropetrovsk, Kirovograd, Nikolaev, Odessa, Poltava, Sumy, Kharkov and Cherkasy regions of Ukraine.