A 35-year-old Indian male killed 14 members of his possess family, including 7 children and his parents, before murdering himself, military say.
Reports advise Hasnin Warekar laced his family’s food with sedatives before slitting their throats.
Neighbours from a home in Thane, nearby Mumbai, were alerted to a conflict by a screaming of a man’s sister, who survived a attack.
Police contend it is still misleading because Warekar carried out a attack.
Authorities are nonetheless to doubt Warekar’s sister, Thane military orator Gajanan Laxman Kabdule told AFP, as she was “in low trauma” during a city hospital.
Television footage showed bodies being carried out of a home, lonesome in sheets.
The family had collected for cooking in Thane, about 32km (20 miles) from Mumbai, on Saturday evening.
Thane military commissioner Ashutosh Dumbre pronounced a indicted “bolted all a doors of a residence and murdered his family while they were asleep”, regulating a blade that was found nearby his body.
Local media reports pronounced a family members were drugged, though that has not been reliable by police.
The victims’ bodies were detected on Sunday morning in a man’s home.
Warekar is believed to have worked as an accountant in Mumbai.