A 43-year-old woman has been stabbed to death and a man killed after being hit by a vehicle in west London.
The woman was stabbed in Chippenham Road, in Maida Vale, just after 09:00 GMT, the Metropolitan Police said.
When officers arrived to reports of the stabbing, they also found a man, 41, had been hit by a vehicle. Both died at the scene.
Detectives have arrested the driver of the car, a 26-year-old man, on suspicion of murder.
Det Ch Insp Jim Eastwood said: "This was a terrible incident that occurred in broad daylight on a busy London street.
"It also appears that a number of members of the public bravely tried to intervene to stop the attack.
"A man has been arrested in relation to the case; we are not aware of any links between this man and the two deceased.
"I can also confirm that we are not currently looking for anyone else in connection to this incident."
Woman stabbed to death and man killed by vehicle in Westminster
The woman was stabbed in Chippenham Road, in Maida Vale, just after 09:00 GMT, the Metropolitan Police said.
When officers arrived to reports of the stabbing, they also found a man, 41, had been hit by a vehicle. Both died at the scene.
Detectives have arrested the driver of the car, a 26-year-old man, on suspicion of murder.
Det Ch Insp Jim Eastwood said: "This was a terrible incident that occurred in broad daylight on a busy London street.
"It also appears that a number of members of the public bravely tried to intervene to stop the attack.
"A man has been arrested in relation to the case; we are not aware of any links between this man and the two deceased.
"I can also confirm that we are not currently looking for anyone else in connection to this incident."
Woman stabbed to death and man killed by vehicle in Westminster