"A new batch of military hardware has arrived in Debaltseve, this includes ten Gvozdika and four Akatsia self-propelled artillery units and four tanks," Fedychev said.

A new column of military hardware from Russia – up to five Grad multiple rocket launchers, up to five Ural trucks and up to 10 tanks – has crossed the border with Ukraine, Fedychev added.

"Up to 250 Russian soldiers have crossed the Ukrainian border," he added.

According to him, a field camp of Russian-backed militants with 20 Grad systems, over 30 T-72 tanks and up to 15 BMP-2 infantry combat vehicles are stationed not far from the town of Torez in Donetsk region.