Twenty-six-year-old Saroj was thrashed by a group of people during an argument in Katra Bazar on Saturday. He succumbed to his injuries on Sunday.
The situation is tensed after a group of people burnt a bus on Monday in a protest against death of Saroj.
The Uttar Pradesh Police on Sunday arrested the main accused in the case after a video of the incident went viral on social media.
The police also identified, Vijay Shankar, a Train Ticket Examiner (TTE) as one of the attackers.