Police have confirmed that three women, who were found dead in their beds in a house in Bradford, died from stab wounds.
Duksha Lad, 44, and her daughters Trisha, 19, and 16-year-old Nisha were discovered in their home in Blackberry Way, Clayton, on Monday.
Mrs Lad's husband Jitendra, 49, was also found in the property. He died from hanging, a post-mortem examination found.
Detective Superintendent Simon Atkinson, from West Yorkshire Police, said: "I have spoken to the family members this evening and updated them on the results of the post mortem examinations.
"They are continuing to come to terms with what took place at Blackberry Way, which has robbed a family of two generations, and specially trained officers are supporting them at this very difficult time.
"Inquiries are continuing into the circumstances leading to the incident and we will not be drawn on speculation while our investigation is ongoing.
"I would reiterate that we are not looking for anyone else in connection with the deaths and neighbourhood officers have increased patrols in the area to offer reassurance to local people."
Police believe the three women died at the weekend. Officers were called to the house by a neighbour, who was concerned they had not seen the family.
Trisha was in the second year of a biochemistry degree at Leeds University.
Her friend Jessica Garside said: "She was so lovely. She always had a bright smile on her face. She was always happy."
Mr and Mrs Lad both worked as clerical officers at Bradford Council, where colleagues were said to be "very upset".
Their deaths have shocked the "close-knit community" of Clayton who described the family as "lovely people".
West Yorkshire Police confirmed it had launched a murder investigation, but were not looking for anybody else in connection with their deaths.