UPDATE: Three bodies have been found in the search for ex-EastEnders star Sian Blake, 43, who went missing from her home in London with her two children, Zachary, eight, and Amon, four, on 13 December.
It is believed the bodies were found in the back garden of the property. They have not been formally identified yet, although police have now officially declared this to be a murder investigation.
Det Supt Monk told Sky News: "Sadly, as part of a thorough forensic search we are carrying out at the family's home in Erith, we recovered three bodies from the garden of the property.
"As yet, we have not formally identified the bodies but this is of course a significant development and Sian's family have been informed.
“This continues to be a fast-moving investigation and our thoughts are with Sian's family at this time.
"We continue to appeal for any information that could help us trace Sian's partner Arthur Simpson-Kent. If anyone has any information about where he is or his movements since December 16 then please get in touch with us.
"I would also like to ask anyone who may have seen Sian and her children, or who may have information about their movements since the last confirmed sighting on 13 December, to call us."
Sian Blake's partner, Arthur Simpson-Kent, 48, spoke with police about her disappearance when they visited the family home on 16 December.
He has not been seen since then, causing officers to also become concerned about his whereabouts.
Scotland Yard's Homicide and Major Crime Command, leading the search, have now revealed that Sian’s silver-beige Renault Scenic was found in Bethnal Green, east London, on Sunday.
It is not known why the vehicle was parked there and by whom.
Despite the fact that murder detectives are now leading the investigation, police have said that it continues to be a “high-risk missing persons” inquiry.
Detective Chief Inspector Graeme Gwyn of the HMCC said: "A number of enquiries are underway to find Sian Blake, Arthur Simpson-Kent and their two children.
"They have all been missing for a considerable period of time now, and I am growing increasingly concerned for their welfare.
"In particular Sian suffers from a serious life-threatening condition and we do not know if she is receiving the medication and treatment she requires to keep well.
"I am appealing directly to Sian and Arthur to get in touch with the police and let us know they are all well. I am also appealing to anyone who has seen the family or knows where they may be to get in touch as soon as possible."
Sian, who played Frankie Pierre in BBC soap EastEnders in the 1990s, suffers from motor neurone disease.
She is described as a black woman, 5ft 2ins tall of slim build with short black hair, who often wears glasses.
Arthur Simpson-Kent is described as a light skinned black man who is 6ft 2ins tall. Zachary and Amon are both described as light skinned black boys. It is not known what any of the family was wearing when they went missing.
Police are asking anyone with information to contact them on 020 8721 4805 or Crimestoppers on 0800 555 111.