Victim's mother had earlier filed a molestation case against accused, police said.
A man was arrested in Nehru Nagar area of Mumbai's Kurla suburb for allegedly killing his neighbour over an old rivalry, a police official said on Tuesday.
Tanaji Khavar (40) was held on Monday night for entering the home of Dnyaneshwar Dangat and bludgeoning him to death with an iron rod, he said.
Dangat's mother had earlier filed a molestation case against Khavar, he said.
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