By Hyunsu Yim and Ju-min Park SEOUL (Reuters) -South Korean investigators will seek an extension of a warrant to arrest impeached President Yoon Suk Yeol, as visiting U.S. Secretary of State Antony Blinken reaffirmed confidence in the key Asian ally's handling of the political turmoil.

South Korea’s anti-graft agency will seek to extend an arrest warrant for President Yoon Suk Yeol, as pressure mounted on law enforcement to resolve the country’s escalating political crisis.

The Corruption Investigation Office for High-ranking Officials will likely seek a new court warrant to extend the window for Yoon’s detention, according to police.