Detectives have launched a murder investigation after three people were found dead.
Police were called to a property in west London on Friday afternoon where they found a 30-year-old man dead on a first floor roof in Westbourne Park Road.
His death is being treated as unexplained, the Metropolitan Police said.
The following day police went to Landor House, in Westbourne Park Road, to inform the man’s next of kin.
But on entering the house just before 1.30pm they discovered the bodies of a man and woman. They were pronounced dead at the scene.
Both are believed to have died in suspicious circumstances and a murder investigation has been launched.
Formal identification has not taken place and a post-mortem examination will take place in due course.
Next of kin have been informed of the deaths, but police have not released the names of the victims.
No arrests have been made, but police are not looking for anyone else in connection with this incident at this stage.
However they stressed that enquiries continue.
Forensics officers wearing light blue protective clothing and white masks are searching a flat in the two-storey Landor House.
A blue forensics tent has been erected outside the 1960s block of flats.
Three bouquets of flowers have been left in tribute outside the home.
Police have cordoned off the area with blue and white tape and uniformed officers are standing guard.
Residents in the block are having to sign in and out when they leave their homes.
Two men arrived in a private ambulance tonight to take the bodies away from the maisonette flat.
Scotland Yard said the 30-year-old man had been arrested on February 10 on suspicion of affray and had been due to answer his bail on Wednesday.
A spokesman said: “A referral will be made to the Independent Police Complaints Commission on Monday.”
A woman who lives next door to the address where the man and woman were found dead said she was “shocked”.
She said police had been called to the address on Thursday, but a man, believed to be the couple’s son, had tried to block them from going inside.
The woman, who asked not to be named, said: “The last time I saw the wife was on Thursday and she didn’t look happy. She looked a bit fed up and sad.
“We were walking into the estate together, I told her my mum was in Bangladesh and she said she wanted to go back to Morocco. She was a bit fed up.
“She said her husband had called her and said there was some trouble in the house.
“On that same night when I went home my brother told me that police had been round and they were looking for the son and opened the door.
“He got the impression he was in there and not letting them in.
“I hadn’t seen the son for a few years, and then I saw him again about a month and a half ago.
“He did used to get into a fair amount of trouble, but he never disturbed us.”
But the woman said she had heard nothing suspicious from the couple’s home on Friday.
She said: “There was no noise, nothing to indicate what might happen.”
And she paid tribute to the “lovely couple” who also have a grown-up daughter and a grandson.
She said: “They were just a really nice couple. I’m just so shocked. They were always so nice.
“She would always go and see her daughter and grandson.”
She said the couple, originally from Morocco, were very house-proud and doting grandparents to their grandson, who is around seven or eight years old.
She said: “The husband was a very quiet man. They had an extremely beautiful house. She kept everything immaculate.
“They would often go back to Morocco and see their family. It is awful.”