The powerful sister of North Korean leader Kim Jong Un has accused South Korea of deliberately avoiding responsibility for the alleged flights of South Korean drones over the North's capital.

North Korean leader Kim Jong Un warned again that he could use nuclear weapons in potential conflicts with South Korea and the United States, as he accused them of provoking North Korea and raising animosities on the Korean Peninsula,

Kim Jong Un issued his second ominous message, saying he plans to make Pyongyang a top nuclear player and expand its capabilities in face of South Korea-U.S. partnership.