Shyamlal Munda and his brother Ram Singh Munda entered the victims' house and killed four members of the family last night, Superintendent of Police Inderjeet Mahatha said.
The accused suspected the family practised black magic and killed Jinkaru Mundain (75), her daughter Soru Mundain (55), two sons Ghasia Munda (50) and Hagal Munda (40).
The accused claimed that the one-year-old son of Shyamlal died yesterday because of black magic practised by the family.