North Korean leader Kim Jong Un ’s powerful sister yet again taunted South Korean efforts to improve ties, state media reported Wednesday, saying that her country will never accept Seoul as a diplomatic partner.

U.S. military drills and vowed a rapid expansion of his nuclear forces to counter rivals, state media said Tuesday, as he inspected his most advanced warship being fitted with nuclear-capable systems.

Kim Yo Jong, sister of North Korea's leader Kim Jong Un, arrives at the Vostochny Сosmodrome before a meeting of Russia's President Vladimir Putin with North Korea's leader Kim Jong Un, in the far eastern Amur region,