The boys, aged between 4-12, belong to a family in Digras village in Maharashtra and were killed between December 2009 and March 2010, police said.
The killings came to light recently following which police registered a case of murder against six suspects and arrested four persons on Wednesday after conducting searches at their residence, Police Inspector M A Rauf told PTI.
The four accused identified as Parshuram Dalvi, Kalvati Kundlik Mokle, her husband Kundlik Mokle, Aasha J Dalvi, Vandana Mokle and her husband Vithal Mokle have now been remanded to police custody till March 22.
The accused landed in police net after Vandana allegedly tried to sacrifice one more child -- Rishikesh Dalvi -- earlier this month, at the behest of a local self-styled
Vandana, who is childless, was also allegedly preparing to sacrifice 11 children to fulfil her wish to become a mother, sources said. Police also recovered material like ash, black thread, unknown poisonous substances and some herbs during the search, he said.