Kim Yo-Jong / Yonhap

The sister of North Korean leader Kim Jong-un warned Sunday that annual summertime military drills between South Korea and the United States will cloud the future of inter-Korean relations.

Kim Yo-Jong issued the warning in a statement carried by the Korean Central News Agency, just days after the North restored long-severed communication lines with the South and raised hope for a new round of detente between the two sides.