By Philip Pullella VATICAN CITY (Reuters) -Pope Francis called for halt to attacks in Ukraine on Sunday so aid can reach the exhausted population and urged leaders to “listen to the voice of the people”, who fear an escalation. Speaking to tens of thousands of people in St. Peter’s Square, he noted that the day most Eastern Christians, including Orthodox and Catholics in Ukraine and Russia, celebrate Easter coincided with the two month mark of the war. “Instead of stopping, the war has become more harsh,” he said from the window of the official papal study. “I renew an appeal for an Easter tru…