By Alessandra Prentice ZAPORIZHZHIA, Ukraine (Reuters) – As many as 60 people are feared to have been killed when a bomb struck a village school in eastern Ukraine, the regional governor said on Sunday while Russian forces continued shelling the last holdout of Ukrainian resistance in the ruined southeastern port of Mariupol. Luhansk region Governor Serhiy Gaidai said the school in Bilohorivka, where about 90 people were sheltering, was hit on Saturday by a Russian bomb, setting it ablaze. “Thirty people were evacuated from the rubble, seven of whom were injured. Sixty people were likely to ha…