Police have named a couple found dead at their home in Idle, Bradford on Sunday.
The deaths of Margaride Rufino, known as Guida, 38, and Anthony Roberts, 37, have left their two-year-old daughter an orphan.
West Yorkshire Police confirmed they have launched a murder investigation, but said they were not looking for anyone else in connection with the case.
Police were called to a “domestic incident” on Sunday evening and found Ms Rufino with serious injuries to her neck and Mr Roberts with serious injuries to his leg.
Both were pronounced dead at the scene and two knives were recovered.
A post-mortem is due to be carried out.
Officers said the couple’s daughter was not in the house at the time of the incident and is now being cared for by relatives.
Detective Chief Inspector Ian Scott said: "The police investigation is still at an early stage; however, we are treating this as a murder inquiry.
"A full post-mortem will be conducted to determine the cause of death for both Ms Rufino and Mr Roberts.
"At this stage we are satisfied that no other parties were involved in the incident."
Police are appealing for anyone who heard or saw anything suspicious around 6pm on Sunday to get in touch with the homicide and major enquiries team on 101, or Crimestoppers, anonymously, on 0800 555111.
Additional reporting by PA
