At least three people died and more than 20 others including women and children were injured when a passenger bus overturned here on Friday. Rescue sources said that a Pishin bound passenger bus coming from Karachi turned turtle due to over speeding at National Highway in Khuzdar. Three people died on the spot in the accident while about two dozen others including women and children sustained injured. The injured were shifted to hospital where condition of some wounded people was stated to be serious and it was feared that death toll could rise further.