The incident took place last evening in the dalit locality of Chonkpuri village when the families of Munna and Lokendra clashed over some dispute related to drainage system between the houses, they said.
Later, some members of the Lokendra's family entered the house of Munna and attacked his wife Munni with spade, leading to her death on the spot, they said.
A case has been registered in this connection while the further probes are on, they added.