A man has been held on suspicion of murdering his partner and her eight-year-old daughter after their bodies were found in a house.
The victims have been named locally as Sarah Laycock, 31, and her daughter Abigail and the suspect as plasterer John Miller, 36.
Mr Miller, arrested on Saturday afternoon, is also being held on suspicion of trying to murder a girl aged four found with minor injuries at the property in Garforth near Leeds.
Forensic science officers were at the house yesterday as neighbours spoke of their shock.
Audrey Bottomley said: "He would always say hello or good morning. He was out with his children on Christmas Day. I can't understand it. The lady who lived there seemed shy and didn't seem to mix with anyone on the street."