LONDON -- South Korean prosecutors formally indicted President Yoon Suk Yeol on Sunday, charging him with insurrection over his brief imposition of martial law in December, according to opposition lawmakers and South Korean media.

The formal indictment with detention means impeached leader Yoon Suk Yeol will now be kept behind bars until his trial, which must happen within six months.

South Korean investigators asked prosecutors to indict the country’s detained President Yoon Suk Yeol over his short-lived imposition of martial law last month, as it accused him of rebellion, abuse of power and obstruction of parliament.