“We lack mobile air defense systems ... and armored vehicles,” RIA Novosti quoted Arestovich as saying.

According to him, the Russian Armed Forces still outnumber the Armed Forces of Ukraine in terms of the number of infantry on armored vehicles and supporting artillery.

He added that the Ukrainian military has learned to resist artillery, but armored vehicles are not enough at the moment.

Earlier, the head of the Donetsk People's Republic, Denis Pushilin, expressed confidence that the allied forces of Russia, the DPR and the LPR would soon enter the administrative borders of the republic.