Nihal Singh Lodh (50), his sons-- Rahul (20), Bobby (16), Raja (12)-- and their neighbour Anita (35) were killed by Naresh Singh after they entered into a verbal duel with him over the dispute in Majra Khanpur village, they said.
The accused has been arrested and a rifle, which was used as the murder weapon, was seized from his possession.
A case has been registered against Singh in this regard, police added.