Prez Yoon vows to 'fight back'

South Korean President Yoon Suk Yeol defended his martial law decree as an act of governance and denied rebellion charges, vowing Thursday to "fight to the end" in response to attempts to impeach him and intensifying investigations into last week's dramatic move.

In a televised speech Thursday, Yoon, a conservative, said he enacted martial law as a warning to the liberal Democratic Party. He called the party "a monster" and "anti-state forces" that he said tried to use its legislative muscle to impeach top officials, undermined the government's budget bill for next year and sympathised with North Korea.