SEOUL, Jan 13 - North Korea's Kim Yo Jong, the sister of leader Kim Jong Un, said on Tuesday South Korea's hope for an improvement in relations is an illusion that cannot be realised, state media KCNA reported.

The leader's powerful sister, who is a director of North Korea's ruling party, criticised a comment attributed to a South Korean government official on Tuesday that Seoul saw a chance of talks resuming with Pyongyang based on her recent reaction to an alleged drone incursion into her country.