Mahendra Pratap Singh, the son of Congress leader Jang Bahadur Singh, was on Saturday night shot dead by unidentified men near Raniganj market in Uttar Pradesh's Amethi district, police said.Mr Singh, 41, was shot while he was on his way home in Fatte ka Purwa area in his car, said Amethi Superintendent of Police (SP) Hira Lal.