"Our fighters have advanced very well and entrenched themselves in strongholds that were previously for the Armed Forces of Ukraine. The enemy is pulling up more and more new reserves, is putting up fierce resistance, "RIA Novosti quoted him as saying.

Ganchev clarified that the main positions, strategically convenient for further advancement, are occupied by the Russian Armed Forces.

At the same time, he added that the Armed Forces of Ukraine "already have very large losses."

Earlier, Ganchev said that the aviation of the Russian Armed Forces destroyed the bridge over the Oskol River in Kupyansk, through which the Ukrainian military pulled together reserves.