North Korean leader Kim Jong-un and other top officials visited one of the country's most sacred sites on Tuesday to pay their respects to the two late leaders, the North's media reported.

North Koreans mark key anniversaries by visiting the Kumsusan Palace of the Sun in Pyongyang, home to the embalmed bodies of Kim Il-sung and Kim Jong-il, who are the grandfather and father of the current leader.

The North's official Korean Central News Agency (KCNA) said Kim paid homage to the two late leaders "in the humblest reverence" as North Korea commemorated the 22nd anniversary of Kim Jong-il's assumption of the supreme commander of the military.

Last week, Kim also paid tribute to his late father in the mausoleum to mark the second anniversary of his death.

Kim Jong-un took over North Korea in 2011 following the sudden death of Kim Jong-il, who also inherited power from his father, Kim Il-sung, the North's founder.

Kim's latest visit came less than two weeks after the North executed his once-powerful uncle, Jang Song-thaek, who had long been considered the North's No. 2 man and Kim's regent, for treason.

Meanwhile, Kim Kyong-hui -- Kim's aunt and husband of Jang -- did not visit the mausoleum for the second time in a week. The North's state media did not provide any details on her conspicuous absence.

The National Intelligence Service, South Korea's top spy agency, reported to the parliament on Monday that Kim Kyong-hui is believed to be safe, though she refrained from public activity.

Kim Kyong-hui's fate had been in question after she failed to attend a national memorial service last week for her elder brother, late North Korean leader Kim Jong-il. (Yonhap News)