The incident took place last night in which Balchandra Ahirwar (45), his son Sandeep Ahirwar (18) and nephew Sunil Ahirwar - all residents of Kishorepur village were killed on the spot, Nivari police station Inspector R S Chauhan said.
When the deceased did not return home in the evening, their family members started a search and found them in the agriculture field, the officer said.
The bodies have been handed over to the family after postmortem and investigations are underway, police added.