Kim Yo Jong, the powerful sister of North Korean leader Kim Jong Un, said South Korea's recent military drills near the border between the two nations are an inexcusable and explicit provocation, according to a report from state media KCNA on Monday.
Kim Yo Jong also accused Yoon of creating tensions on the Korean peninsula to divert public attention away from his poor performance in domestic politics. She cited an online petition calling for Yoon to be impeached, with more than 1 million signatures.
Kim said that in case North Korea judges its own sovereignty as violated, its armed forces will immediately carry out mission and duty according to its constitution.
The South Korean military has resumed live-fire artillery drills near the western maritime border in late June, the first time since 2018.
Last month, South Korea said it would suspend a military agreement signed with North Korea in 2018 aimed at easing tensions, in protest against North Korea's trash balloon launches toward the South.