Kim Jong-un filmed limping in public

Rare footage showing North Korean leader Kim Jong-un limping as he attended commemorations marking the 20th anniversary of his grandfather's death, have aired on state TV.

In the video, Kim walked into the mausoleum with a limp and bowed deeply in front of statues of his grandfather Kim Il Sung and his father Kim Jong Il.

After that, Kim looked around an exhibition hall where the belongings of the late leaders are on display.