MOSCOW, November 3. /TASS/. A series of explosions was heard in the eastern Ukrainian city of Kharkov in the early hours of Friday, the Zerkalo Nedeli news portal reported.

Shortly after, the portal said that reports of blasts came from the western Ukrainian Lvov Region as well.

Earlier, the Ukrainian media reported that explosions rocked the southern port city of Odessa and central Ukrainian cities of Vinnitsa and Kropivnitsky (formerly known as Kirovograd).

As of 01:40 Moscow time on Friday (10:40 p.m. Thursday GMT), an air raid warning has been in place in the following Ukrainian regions: Vinnitsa, Dnepropetrovsk, Kirovograd, Nikolayev, Rovno, Ternopol, Kharkov, Khmelnitsky, Chernovtsy and Cherkassy, as well as in the Ukrainian-controlled areas of the Zaporozhye and Kherson regions.