Two teenage girls were among four people arrested after a man was stabbed to death during a suspected robbery.
The 38-year-old was found collapsed at the junction of Parson Street and Brent Street, Hendon, at 4.45pm yesterday.
Police and ambulance crews raced to the scene where they battled to save his life for more than 30 minutes, but he was pronounced dead from a single stab wound at 5.28pm.
The attack took place near St Mary’s Secondary School, Hendon School and the Gan Menachem nursery. St Mary's will be closed all day as a result.
Police say a 16-year-old girl and a 17-year-old girl have both been arrested in connection with the incident, as well as a 19-year-old man and a 20-year-old man. They remain in police custody.
At this stage, it is believed that the victim was fatally stabbed in a robbery.
Detective chief inspector Matt Bonner of the homicide and serious crime command, who is leading the investigation, said: "This is a busy area for highway traffic and it was a bright clear day.
“I'm certain people driving or walking through the area saw something leading up to and during the stabbing that could be of vital importance to investigators.
"I would urge those people to contact us so that we can piece together the events that lead up to this murder.