Officials investigating whether president put improper pressure on conglomerate bosses

South Korean prosecutors will question President Park Geun-hye over a political corruption scandal engulfing her presidency, an official said on Sunday, the first time a sitting president will be questioned by prosecutors over a criminal case.

Hundreds of thousands marched in the capital Seoul on Saturday demanding Park resign. Many protesters said Park, whose public support has dropped to 5 percent, was unfit to rule.