South Korean anti-corruption agency asked prosecutors to indict impeached President Yoon Suk Yeol on insurrection charges after wrapping up a preliminary investigation into his ill-fated martial law declaration.

South Korean investigators asked prosecutors to indict detained President Yoon Suk Yeol over his short-lived imposition of martial law last month, which the country's ousted defence minister testified that he wanted a broader military deployment than Yoon.

South Korea's anti-corruption officials on Thursday requested that prosecutors indict impeached President Yoon Suk Yeol for insurrection and abuse of power for his short-lived martial law declaration.