SEOUL, South Korea - South Korea's Yonhap news agency is quoting prosecutors as saying they will likely question President Park Geun-hye over suspicion that she let a shadowy longtime confidante manipulate power from behind the scenes.

If would be the first time that a sitting president has been questioned by prosecutors.

Yonhap quoted a Seoul Central District Prosecutors' Office official as saying Sunday that the questioning is most likely to take place later this week.