The US diplomat responsible for North Korea said Friday that Pyongyang is proceeding with its nuclear program and showing no clear sign of steps that would permit international talks on ending it to resume

The US diplomat responsible for North Korea said Friday that Pyongyang is proceeding with its nuclear program and showing no clear sign of steps that would permit international talks on ending it to resume.
  
"There's very strong consensus among the five parties that in order for us to have any chance of success in nuclear negotiations we need a very strong commitment from the North Koreans that in fact they would be a serious negotiating partner if and when negotiations resume," Sung Kim told reporters in Beijing. "And that's what we're waiting to see from the North Koreans," added Kim, Washington's special representative for North Korea policy.
  
"We are concerned that North Koreans are continuing to pursue their nuclear program, improve their nuclear and missile capabilities."