Part-PAR-Par8027068-1-1-0NATO on Wednesday accused Russia of sending fresh columns of tanks, troops and military hardware into Ukraine as Kiev said it was preparing for a return to combat in the war-torn east. The claims come amid growing fears of a return to all-out conflict in the region despite a two-month ceasefire which has stopped much frontline fighting but not shelling at strategic flashpoints. “We are deeply concerned by the possibility of a return to full-scale fighting,” UN Assistant Secretary-General Jens Anders Toyberg-Frandzen told an emergency meeting of the UN Security Council. More