Russian troops have increased the pressure on Ukrainian defensive positions during heavy fighting in eastern Ukraine, the Ukrainian commandor of the region said on Saturday The battles are centred on the area west of Bakhmut, Serhiy Sidorinon told Ukrainian television . “The enemy is taking heavy losses, but is constantly replenishing its ranks with new reserves,” he said. The aim of the Russian attacks is to push through to Chasiv Yar. “There is fighting during the day, but also at night,” Sidorin said. For their part, the Ukrainian armed forces were trying to break the Russian offensive mome…