Police investigating the death of a family-of-four in Bradford say 44-year-old Daksha Lad and her teenage daughters Trisha and Nisha, were all stabbed to death in their beds.
A post mortem examination performed on 49-year-old Jitendra Lad confirmed that he died from compression of the neck caused by hanging.
Detective Superintendent Simon Atkinson 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."
The school where Trisha and Nisha Lad attended has said they are "deeply shocked and saddened" by the deaths of the teenagers.
Trisha Lad, 19, attended Thornton Grammar School in Bradford before going on to the University of Leeds. Her 17-year-old sister Nisha is believed to have still attended the school.
Chris Sampson, headteacher of Thornton Grammar, said: "We are deeply shocked and saddened by these tragic deaths.
"Our thoughts are with the family's relatives and friends. We will be helping the police with their inquiry in any way we can."
The University of Leeds confirmed Trisha was in the second year of a biochemistry degree.
A spokesman said: "This is dreadful and shocking news and our thoughts are with Trisha's friends and loved ones.
"Staff are working with the University's counselling and chaplaincy services to help students who are affected by this tragedy and we will do all we can to support them."
Melissa Taylor, president of the Faculty of Biological Sciences Society at the university, said on Twitter: "Heartbreaking to hear about the death of Trisha Lad, such a lovely, well-liked person. Rest in Peace."
Steph Mapplebeck said: "Trisha Lad was one of the sweetest and kindest people I have met whilst studying at Leeds. What a heartbreaking loss. Rest in peace."
Friends and neighbours have paid tribute to the Lad family who were found dead in their home in Bradford.
Jessica Garside, a school friend of Trisha, said the 19-year-old had been studying at the University of Leeds after attending Thornton Grammar School in Bradford.
Miss Garside said: "She was so lovely. She always had a bright smile on her face. She was always happy."
Neighbour Barry Hawkins said: "I used to say hello to the mum and dad and I used to see the daughter go to school. I've seen them grow up.
"They were a lovely couple and the kids were lovely. Well mannered. They were well respected.
"I've know them for 10 years. It's bad but it'll pull us all together."
Colleagues who worked with Jatindra and Duksha Lad at Bradford council are "very upset" at news of their death, the leader of the local authority has said.
Councillor David Green said: "Local people are shocked and saddened by the news of this terrible event and our sympathy goes out to the wider family, friends and neighbours of this family.
"The husband and wife of the family... both worked for Bradford Council and councillors and employees are very upset after hearing the dreadful news of their deaths."
Police have opened a murder enquiry after a family of four were found dead in Bradford.
Officers believe father Jatindra Lad murder his wife Duksha and daughters, Nisha, 17 and Trisha, 19, before taking his own life.
Police went to the property last night when a neighbour contacted the authorities after not seeing the family for some time.
Detective Superintendent Simon Atkinson said he and his team were "undertaking forensic enquiries to establish how these people have died".
However he said they were "not looking for anybody else" in connection with the incident.
The family found dead in a house in Clayton, Bradford, have been named by West Yorkshire Police as father Jatindra Lad, 49, mother Duksha Lad, 44, and their daughters Trisha 19, and Nisha, 17.
West Yorkshire Police have issued a statement on the discovery of four bodies at a house in Bradford yesterday evening.
At about 8.30pm last night (Monday October 27), police were called to a house in Clayton, Bradford, following the discovery of the bodies of a man, a woman and two teenage women.
Enquiries are at a very early stage, but police are not currently looking for anyone else in connection with the enquiry.
Police have sealed off the area while forensic investigations take place and this is expected to take some time.
We are not currently in a position to release further details, but hope to be able to give a further update later this morning.
Four bodies have been discovered at a house in Bradford, West Yorkshire Police have announced.
Police said that enquiries were at a "very early stage" but they are not currently looking for anyone else in connection with the case.
Officers were called to the property in the Clayton area of the town at around 20.30 last night, police said.