The 92-year-old widow of South Korean President Kim Dae-jung has returned to Seoul after a four-day visit to North Korea that apparently ended without a meeting with North Korean leader Kim Jong Un.

Lee Hee-ho told reporters Saturday that she wasn't carrying any official duty on behalf of South Korea during her trip.

Relations between the rival Koreas have been testy following the recent opening of a U.N. office in Seoul tasked with monitoring North Korea's human rights situation and the North's refusal to release several South Koreans detained there.

Kim Dae-jung advocated rapprochement with Pyongyang and held a landmark summit with Kim Jong Un's father and late North Korean leader Kim Jong Il in 2000. He won the Nobel Peace Prize later in 2000 for his efforts.