PYONGYANG, Korea, Democratic People's Republic Of - A senior UN official has left Pyongyang after four days of talks with the North Korean Foreign Ministry.

UN Undersecretary General for Political Affairs Jeffrey Feltman says "I have to brief the secretary general first" when asked for details of his trip.

Feltman met North Korean Foreign Minister Ri Yong Ho on Thursday and also had two sessions of talks with Vice Foreign Minister Pak Myong Guk.

Feltman, the highest-ranking American in the UN secretariat, is the first person in that post to visit North Korea since February 2010.

North Korea regularly accuses the UN of bias, criticizing the UN sanctions resolutions that condemn Pyongyang's missile launches and nuclear tests. Pyongyang says those resolutions are illegal and it has the right to pursue missile and nuclear programs.