Yonhap news agency says South Korean prosecutors have indicted the impeached President Yoon Suk Yeol over his imposition of martial law.

South Korean President Yoon Suk Yeol's term in office has been dogged by personal scandals, an unyielding opposition and rifts within his own party, and a rapid fall from grace over his short-lived declaration of martial law last month.

Impeached South Korean President Yoon Suk Yeol has been charged with insurrection after his December attempt to declare martial law, plunging the country into an unprecedented political crisis. He is the first sitting president in South Korean history to face criminal charges.