Detectives are investigating the unexplained death of a man found collapsed at a house in Ruislip.
Paramedics were called to the terraced property, in Whitby Road, at around 5.40pm on March 30.
A 63-year-old man was pronounced dead at the scene. His next of kin have been informed and a post mortem will be held on Friday (April 10).
A Metropolitan Police spokesman said the death was being treated as "unexplained" and "neither suspicious, nor non-suspicious".
In a statement, the Met added that officers are not looking for anyone in connection with the case. However, the house is being treated as a crime scene.
On Wednesday (April 8), an officer stood guard outside the property, for what residents said was the second day running.
Shams Tahar, 60, who lives in the road, said: “We have no relations with them but we see them sometimes with two very big dogs.
“It's a very quiet neighbourhood. Even when we go out we don't see our neighbours.
“When we saw the ambulances we prayed to God it was nothing serious.
“It's so sad to hear what has happened.”
Another neighbour, who wished to remain anonymous, said those living at the property "kept themselves to themselves".
He added: "It's a relief police are not looking for anyone. At least as far as the neighbours are concerned we don't have to worry."