Seven persons have been booked in the case, the official said, adding that raids were underway to arrest them.
According to the police, the groups, who were from the same community, had a dispute around two months ago. Sumit had then thrashed a person from the other side, they said.
On August 9, a clash again broke out between the two groups following which heated arguments ensued and the two sides came to blows and attacked each other using sticks, police said.
Sumit, who was married and had a child, was wounded in the clash. He was admitted to a hospital, where he succumbed to his injuries the next morning, they said.
A case was registered at the Dadri Police Station under the Indian Penal Code Sections 302 (murder), 147 (rioting), 148 (rioting with armed weapons), 149 (unlawful assembly) and 504 (intentional insult with intent to provoke breach of the peace) were invoked, among others, they said.
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