Salesman Sheshpati was beaten by lathis leading to his death last night at Sarai Sangrampur village under Lalganj police station, they said.
On the complaint of family members, a case was registered against Suresh Narayan Tripathi, whose wife is contesting for the post of pradhan in the Gram Panchayat elections, police said.
A member of the deceased family is also contesting the election, they said, adding that investigations are on.