A 70-year-old man and his 27-year-old daughter were found dead at a block in Pasir Ris on Sunday (20 August).
The man was found on the ground floor of Block 560 Pasir Ris Street 51 while the woman was found with stab wounds in their home on the second floor.
Police said they were alerted to the incident at around 1.30pm. Both father and daughter were pronounced dead by paramedics at the scene.
Police have classified the case as unnatural death and investigations are ongoing.