In Haridwar, a woman and her two grandchildren were trampled to death by a wild elephant last night on National Highway at Moteechur near Rajaji National Park.According to Director of Rajaji National Park S S Rasaily the incident took place outside Motichur range of the national park last evening when five members of a family were attacked by the wild elephant. He told our Dehradun correspondent that a man and his one daughter managed to run away from the spot whereas three members of his family were trampled by the pachyderm, resulting in their instant death.