Police has registered a case against six people including three private security officers of former Haryana Chief Minister Bhupinder Singh Hooda in an alleged attack on state Congress president Ashok Tanwar during Congress Vice-President Rahul Gandhi's Kisan Yatra, police said."We have registered a case on Friday evening under section 323 (causing hurt) and 506 (criminal intimidation) of the Indian Penal Code," Deputy Commissioner of Police (New Delhi) Jatin Narwal told IANS.Tanwar and several other party workers were injured after a clash broke out between the supporters of the two factions at Bhairon Singh Marg, a meeting point ahead of Rahul Gandhi's rally at Jantar Mantar as the Congress Vice President reached the capital after his nearly-month-long Kisan Yatra across poll-bound Uttar Pradesh.