Fifty-year-old Ram Lakhan yesterday engaged his neighbour Sanjay in an argument over some petty issue, following which the latter hit him on his head with a hockey stick, police said.
They said the blow to head caused serious injuries and Lakhan's family members then rushed him to a private hospital, where he succumbed to his wounds.
Lakhan's son today lodged a complaint in this regard and four accused have been arrested, police said.