South Korean police has questioned the chief of the presidential security service as the two agencies clashed over attempts to detain impeached President Yoon Suk Yeol.

South Korea's Presidential Security Service chief resigned Friday and acting President Choi Sang-mok accepted it. President Yoon Suk Yeol remains in his fortified residence as law enforcement seeks to arrest him.

Pro-Yoon demonstrators hold U.S. and South Korean flags as they take part in a rally in support of impeached South Korean President Yoon Suk Yeol near his official residence in Seoul, South Korea January 10,

South Korean presidential security chief Park Chong-jun plans to appear for questioning by police on Friday, a spokesperson for the security service said. Investigators seeking to arrest South Korea's impeached President Yoon Suk Yeol for possible insurrection were blocked by his security staff in a six-hour standoff last week.

Hundreds of supporters gathered once again outside the president's official residence, pledging to protect him from South Korea's national anti-corruption agency.

Yoon Kab-keun, one of the lawyers representing South Korea's impeached President Yoon Suk Yeol, said on Thursday that Yoon was staying in his official residence. The lawyer made the comment in a briefing to reporters following recent speculation over the suspended president's whereabouts.

South Korea's presidential security chief resigned Friday as he faced questioning over why his guards prevented the detention of impeached President Yoon Suk Yeol and investigators prepared to make a fresh arrest attempt.