Officials seek arrest warrant for South Korea's impeached Yoon

South Korean officials have requested an arrest warrant for suspended president Yoon Suk Yeol, the Yonhap news agency reported on Monday.

The Corruption Investigation Office is investigating Yoon for unexpectedly imposing martial law on December 3.

The office said that Yoon had ignored three summonses to appear for questioning, Yonhap reported.

Yoon's botched attempt to institute martial law shocked the nation but was rescinded just hours later following massive public resistance.

South Korea has been in political crisis ever since. The National Assembly voted to impeach Yoon on December 14, and the Constitutional Court has launched the relevant proceedings to take a final decision on whether the assembly's vote is constitutional or not.

Choi Sang Mok has been acting president since Friday, after lawmakers voted to impeach then-acting president Han Duck Soo, barely two weeks after Yoon was removed from the presidency.

Yoon has labelled his political opponents "anti-state forces" and said that he made the declaration of martial law to protect the nation.