South Korean prosecutors indicted the impeached President Yoon Suk Yeol on insurrection charges over his declaration of martial law, a move that plunged the country into political turmoil.

President Yoon Suk Yeol will stand trial along with his former defense minister and others who participated in his short-lived imposition of martial law.

SEOUL (Reuters) - South Korea's prosecutors indicted suspended President Yoon Suk Yeol on Sunday on charges of leading an insurrection with his short-lived imposition of martial law on Dec. 3, the Yonhap news agency reported. The decision came after anti-corruption investigators last week recommended Yoon be formally charged.

North Korea said Sunday that it tested a cruise missile system, its third known weapons display this year, and vowed “the toughest” response to what it called the escalation of U.

North Korea's foreign ministry vowed the "toughest counteraction" against the United States as long as Washington "refuses" the country's sovereignty.

The action suggested North Korea will likely maintain its its confrontational stance against the U.S. for now, even though President Donald Trump said he intends to reach out to North Korean leader Kim Jong Un.