Sri Lanka, March 20 -- The teenage daughter of North Korea's leader Kim Jong-un was seen driving a tank alongside her father during a military training exercise, adding to speculation that she is being groomed as his successor.

In footage released by state media, Kim and his daughter are both dressed in the black leather jackets they are often seen wearing. The girl, reportedly named Kim Ju-ae, appears to be driving the olive-green tank, with her head sticking out from the hatch. Kim is sitting on the top of the tank, smiling and surrounded by other soldiers.

"She only drove straight at a low speed. It's also easy to drive modern tanks and I think it was easier for her to drive as she was on a flat ground," said Lee Illwoo, an expert wi...