Vasant Guthe, the accused, is resident of Karajgaon-Patil Pada in Talasari in Palghar district.
According to police, Guthe went to the house of his grandmother Sakhu Guthe (55) Tuesday afternoon and accused her of practising black magic.
When the woman's daughter-in-law intervened, Vasant allegedly attacked her too.
A case under IPC section 323 (voluntarily causing hurt) was registered against Vasant and he was arrested, the police officer said.
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