A senior U.S official has warned that North Korea could hold a nuclear test next week to mark the birth anniversary of the country’s late founder, Kim Il-sung, and said that there have been no productive discussions with China or Russia regarding U.S. efforts to condemn Pyongyang’s recent string of missile launches. Special Representative for North Korea Ambassador Sung Kim told reporters at a press briefing on Wednesday that U.S. officials believe Pyongyang could use the April 15 anniversary to showcase its ever-increasing nuclear capabilities but noted that he did not want to speculate too much over what exactly to expect from the East Asian country. “So we are worried that, in connection with the upcoming April 15th anniversary, that the DPRK (Democratic People’s Republic of Korea) may be tempted to take another provocative action. We obviously hope not, but we will be prepared,” Kim said. When asked by reporters whether the concerns regarding provocative actions …