UNITED NATIONS, Jan 12 (Reuters) - China and Russia on Friday vetoed a U.S.-drafted resolution urging Myanmar to end persecution of minorities and opposition groups, killing the measure in the U.N. Security Council. China and Russia argued that Myanmar's actions did not endanger peace and security in the region and therefore went beyond the council's mandate. The U.N. General Assembly has regularly condemned Myanmar, formerly Burma, over human rights abuses.The double veto was the first by Russia and China since 1972. South Africa also voted against the resolution.