Detectives are appealing for witnesses after a male pedestrian was killed in a collision involving a bus.
Emergency services were called after about 5.30am to Great Chertsey Road, Chiswick.
They found a 47-year-old man who was fatally injured. He died shortly after at the roadside.
His next of kin have been told about his death and a post-mortem examination will take place over the coming few days.
The driver of the bus stopped at the crash site and has not been arrested.