title: U.N. chief calls for united, 'appropriate action' on North Korea
text: UNITED NATIONS (Reuters) - United Nations Secretary-General Antonio Guterres  counts on the Security Council to remain united and take appropriate action  on North Korea, his political affairs chief, Jeffrey Feltman, said on Monday after Pyongyang conducted its sixth nuclear test.  Feltman warned the 15-member Security Council that  as tensions rise, so does the risk of misunderstanding, miscalculation and escalation.   The latest serious developments require a comprehensive response in order to break the cycle of provocations from (North Korea). Such a response must include wise and bold diplomacy to be effective,  Feltman told the council.  