South Korean graft investigators say they won't be able to question president Park

Pro-government activists shout slogans and wave flags as they stage a rally in central Seoul on February 25, 2017. South Korea's Constitutional Court will hold its final impeachment hearing to rule on the fate of President Park Geun-Hye at the end of the month, Yonhap News Agency reported February 22.
Ed Jones | AFP | Getty Images

The South Korean special prosecutor's office said on Monday it will not be able to question President Park Geun-hye in person as part of its investigation into an influence-peddling scandal that threatens to topple Park.

Prosecution spokesman Lee Kyu-chul said it was regrettable prosecutors would not be able to question her in person. He said Park's office had refused a demand by prosecutors for a video or audio recording of any questioning.

Final decisions on indictments for all suspects embroiled in the scandal, including executives from Samsung Group, South Korea's largest conglomerate, would be made by Tuesday.

South Korea's political scandal drags on

Follow CNBC International on Twitter and Facebook.