The husband, identified as Sanjoy Bose, was found hanging from a fan, while his wife Rumpa and six-year-old daughter Pujur were found lying face down on a bed nearby in the Salbagan area of Bongaigaon town, it said.
They said blood was oozing out of the mouth of the body of the wife.
Post-mortem reports and investigations would reveal the cause of the triple deaths,
Neighbours and relatives claimed that the family was suffering from acute financial crisis and property dispute.