South Korea's anti-corruption agency detains impeached President Yoon Suk Yeol over his brief declaration of martial law.

Yoon Suk Yeol has become South Korea's first sitting president to be arrested after investigators scaled barricades and cut through barbed wire to take him into custody. Yoon, 64, is being investigated on charges of insurrection for a failed martial law order on 3 December that plunged the country into turmoil.

South Korea looks set for a dramatic political showdown this week as impeachment proceedings kick off against suspended President Yoon Suk Yeol, who remains holed up in his fortified residence evading arrest for a separate criminal investigation.