South Korea's impeached President Yoon Suk Yeol refused to appear for fresh questioning by investigators Thursday, a day after his dramatic arrest over an ill-fated martial law declaration.

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.

South Korean President Yoon Suk Yeol has been detained after a massive law enforcement operation at the presidential compound that ended a weeks-long stand-off between his bodyguards and the country’s anti-corruption agency.