A second year student of LLB on Sunday succumbed to his injuries two days after he was thrashed by a group following an altercation outside a restaurant here, police said.
One of the accused was also arrested after a CCTV footage of the incident went viral on social media.
Dileep (26), and two of his friends had on Friday came to a restaurant in Karnalganj when an altercation broke out with some persons there.
Soon after, they assaulted Dileep with sticks and batons, leaving him grievously injured.
On the basis of a complaint lodged by Dileep's brother, an FIR was registered against three unidentified accused, SSP Akash Kulhari said.
The CCTV footage was examined and on that basis the prime accused was identified as Vijay Shankar Singh who is posted as a TTE with the Indian Railways, Kulhari said, adding that the accused is still at large.
The restaurant owner Amit Upadhyay was arrested as he was familiar with the accused, Singh, and did not inform the police about the incident.
The body has been sent for post mortem and further probe into the matter is on, the senior official said.