South Korea's parliamentary committee looking into President Park Geun-hye's alleged corruption said Friday it will conduct field examinations at the presidential office and a local clinic.

The committee members plan to visit the Presidential Security Service. But it is unclear whether they can carry out the inspection as the presidential office Cheong Wa Dae declined to accept their visit citing security issues.

They also plan to visit a hospital in Seoul where Park and her confidante Choi Soon-sil allegedly received illegal medical treatments.

Park was impeached last week amid allegations Choi exerted influence on state affairs for personal benefits without any seat in the administration. Prosecutors claim Park was an accomplice in her crimes.

On Friday, the presidential office said its stance remains unchanged.

"The presidential office is one of the top security facilities," an official told Yonhap News Agency. "No field investigations ever have been made here."

Cheong Wa Dae also cited the criminal law that bans investigations into such facilities without approval.

Rep. Kim Sung-tae of Saenuri, who heads the parliamentary investigation, said it will push ahead with the plan.

"Being a security facility is not an excuse to avoid the probe.

It will face a strong backlash from the public," Kim said.

The parliamentary panel has been hosting a series of hearings at the National Assembly since last week, summoning key figures linked to the scandal, ranging from former presidential staff members to business tycoons.

On Thursday, it will hold the fifth round of inquiries with 18 figures, including former presidential secretary Woo Byung-woo, who had been dodging the summons request. (Yonhap)