A woman has been arrested in connection with the deaths of a man and four-year-old girl in a West London flat.
Their bodies were discovered in Colville Square, Notting Hill, on Friday evening (27 February.)
Police were called after concerns were raised about the welfare of the occupants of the property.
The girl and the man, believed to be in his 40s, were found shortly before 8pm after police forced entry into the building. Both were pronounced dead at the scene by paramedics. The nature of their injuries has not been released.
The woman, who is in her thirties, is in custody in central London. Her relationship to the victims has not been disclosed,
Police are in the process of formally identifying the victims and informing their next of kin.
The Metropolitan Police's Homicide and Major Crime Command (HMCC) is investigating the deaths, which are being treated as unexplained.
No one else is being sought in connection with the deaths, police said.
Anyone with any information can call 101, visit www.crimestoppers-uk.org or contact Crimestoppers anonymously on 0800 555 111.