The sister of North Korean leader Kim Jong Un has warned that upcoming U.S.-South Korea military drills could jeopardize her country¡¯s talks with Seoul, raising doubts about a diplomatic breakthrough less than a week after both sides announced a resumption of communications.

Kim Yo Jong said Sunday that the plan to hold annual allied exercises this month ¡°seriously undermines¡± efforts to restore ties, according to state-run Korean Central News Agency. The statement by Kim Yo Jong, one of the prominent faces of Pyongyang¡¯s pressure campaign against Seoul and Washington, reinforces worries North Korea would use South Korean President Moon Jae-in¡¯s desire for talks to try to force him to break with the U.S.

¡°Our government and army will closely follow whether the south Korean side stages hostile war exercises in August or makes other bold decision,¡± said the younger Kim, who¡¯s a senior official with the ruling Workers¡¯ Party of Korea. ¡°Hope or despair? Choice is not made by us.¡±