South Korea's ousted premier said on Thursday that he had opposed suspended President Yoon Suk Yeol's declaration of martial law, testifying for the first time at his former boss's impeachment trial about the events of a night that threw the country into turmoil.

South Korea's ousted President Yoon Suk Yeol on Wednesday became the country's first sitting head of state on trial on criminal charges.

Ousted South Korean leader Yoon Suk Yeol became the country's first sitting head of state to stand trial in a criminal case as hearings opened Thursday on his bid to