A senior North Korean diplomat says he knows nothing about reported plans for a visit to Pyongyang by U.N. Secretary-General Ban Ki-moon, but that if the U.N. chief does come he should help improve relations between the two Koreas and between the North and the United Nations.

Ri Hung Sik was responding to questions at a news conference Tuesday about a South Korean news report that the U.N. chief would visit the North Korean capital this week for a possible meeting with leader Kim Jong Un.

Ri, an ambassador-at-large in the Foreign Ministry, said "it is very natural, it is ordinary for the U.N. secretary-general to visit its member states."

He said relations with the U.N. are "not good" because it adopts "unfair" human rights resolutions against his country.