60-year-old-dalit Moti Chand, a resident of Khutahan village, had mortgaged his land to Ramtahan, they said.
Ramtahan forwarded the possession of the land to one Baggi Yadav for agricultural use.
Last week, Moti returned the mortgage amount to Ramtahan and freed his land, they said.
However, Yadav brought nearly two dozen people and started ploughing the land to claim his ownership, the sources said.
When Moti and his family members protested, Baggi along with his supporters allegedly assaulted Moti Chand, his wife Dulari Devi (45), his son Sanjay (25) and Shiv Kumar (28).
Two of Moti's relatives and four other persons were also assaulted by Baggi and his aides, the sources said.
The situation was brought under control by the police and the injured were admitted to a government hospital at Chakia after which one of them was later referred to a hospital in Varanasi, Superintendent of Police Krishna Mohan said.
Security has been tightened in the village to prevent any further untoward incident.
