Kim Jong Un's sister says North Korea warplanes repelled U.S. spy plane, threatens "shocking" consequences

The powerful sister of North Korean leader Kim Jong Un alleged on Monday that the country's warplanes repelled a U.S. spy plane that flew over its exclusive economic zone. She warned of "shocking" consequences if the U.S. continues reconnaissance activities in the area. 

Kim Yo Jong's comments came hours after the nation threatened to shoot down American reconnaissance aircraft while condemning Washington's plans to deploy a nuclear missile submarine near the Korean Peninsula.

The U.S. and South Korean militaries did not immediately respond to the comments by Kim, one of her brother's top foreign policy officials, which were published in state media Monday evening.