Armenia and Azerbaijan accused each other at the UN Security Council Thursday of being responsible for border clashes that killed dozens of people in recent days. The United Nations said, however, that it was unable to verify the allegations from either side. “This aggression is the answer of Azerbaijan to the mediation efforts of the international community,” Armenia’s ambassador to the UN, Mher Margaryan, said. Baku has opted for “a military solution to the conflict,” the ambassador said. “We are receiving reports that the fragile ceasefire is under threat. There are credible reports that Az…