U.S. Secretary of State John Kerry and his South Korean and Japanese counterparts warned North Korea against any "provocative" moves Sunday ahead of a possible new nuclear bomb test by Pyongyang. In a round of calls Sunday, Kerry, Japanese Foreign Minister Fumio Kishida and South Korea's Kim Sung-hwan all agreed the North must understand "that it will face significant consequences from the international community if it continues its provocative behavior," according to a summary of the calls from the U.S. State Department quoted by CNN.