North Korean leader Kim Jong Un has selected his daughter as his heir, South Korea’s spy agency told lawmakers on Thursday.

Kim Ju Ae - who is believed to be 13 - has in recent months been pictured beside her father in high-profile events like a visit to Beijing in September, her first known trip abroad.

The National Intelligence Service (NIS) said it took a “range of circumstances” into account including her increasingly prominent public presence at official events" in making this assessment.