Cease-fire talks broke down between Ukraine’s government and Russian-backed rebels while Kiev reported 28 soldiers killed over the weekend in some of the deadliest fighting since a tentative peace deal was signed in September. Artillery duels around a government-held railway hub of Debaltseve in eastern Ukraine squelched hopes to stem a return to full-scale fighting. Both sides accused the other of shelling civilian areas Sunday. Ukraine’s military says it expects a surge in fighting in the coming days, after Russia sent a convoy of what it said was humanitarian aid into the country over the weekend. Kiev has accused the Kremlin of using the aid convoys to funnel munitions to the rebels and says there is usually an […]