South Korea’s presidential office demanded an official explanation and apology from Ukraine, accusing Kyiv of disclosing the transfer of two North Korean prisoners of war to South Korea and then falsely denying that the two sides had agreed to keep the move confidential.“The presidential office expresses strong regret over Ukraine’s unilateral disclosure and its subsequent false announcement that there had not been a non-disclosure agreement,” Seong Ghi-hong, senior presidential secretary for...