The police said that Darwesh Shahpur and Naveen Dalal who were detained by the police on Monday from Fatehabad in Hisar, Haryana, for allegedly attacking JNU student leader Umar Khalid, were later arrested. The tow claimed on Monday that they were cow vigilantes who had come to create disturbance in the event that was underway at Constitution Club in Delhi to draw attention towards protection of cows.