Metropolitan Police detectives are continuing enquiries after a man and girl were found dead at a home in Colville Square, Notting Hill.
Officers forced their way into the west London home on Friday (27 February, 2015) where they found the bodies of a man, believed to be in his 40s, and a girl, believed to be four-years-old.
Both were pronounced dead at the scene and a second child was taken to hospital by the London Ambulance Service where she remains in a stable condition.
Detectives believe they know the identities of the man and the four-year-old but await formal identification before naming them. Next of kin have been informed.
A post mortem examination was carried out on the man on Sunday, 1 March. However, the cause of death is still under investigation and further tests are being carried out.
A special post mortem is due to be carried out in the morning of Wednesday, 4 March, at Great Ormond Street Hospital on the four-year-old.
Police would not comment on the types of injuries sustained by the man and girl.
A woman, aged 36, was arrested at the address in connection with the deaths and remains in custody at a central London police station. At this stage detectives are not looking for anyone else in connection with the deaths.
Anyone with any information can call police via 101, or contact Crimestoppers anonymously on 0800 555 111 or www.crimestoppers-uk.org.