South Korean investigators trying to arrest suspended President Yoon Suk Yeol have asked for an extension to the warrant that expires Monday, with the embattled leader holed up in his residence.

The former star prosecutor has defiantly refused questioning three times before a failed arrest attempt saw hundreds of protective guards block investigators trying to detain him over a bungled martial law decree last month.

Investigators from the Corruption Investigation Office (CIO) said Monday they will ask for an extension to a warrant due to expire at the end of the day.