Fears that Russia will launch a massive offensive on Kharkiv, the north-eastern Ukrainian city not far from the border and which comes under frequent fire, were growing on Tuesday amid pleas from Kiev for help replacing its dwindling weapons stockpiles. Authorities across Ukraine’s regions, from Lviv in the west to Donetsk in the east, reported deaths from Russian drone and missile attacks over the past day. Energy infrastructure was also once again hit. In Berlin, German Foreign Minister Annalena Baerbock called for urgent international efforts to supply more air defence systems in view of th…