The Metropolitan Police confirmed on Monday (October 9) that as yet no one has been arrested for the incident in which a 17-year-old boy was attacked and injured.
He was taken to hospital after suffering a stab wound to his thigh at around 3.30pm at the junction of Ramsey Close and Lillian Board Way on Friday (October 6).
It is believed the boy did not suffer from life-threatening or life-changing injuries, according to the police.
There was an increased police presence in the area over the weekend following the incident.
Police conducted door-to-door enquiries appealing for witnesses.
Following the stabbing, Chief Inspector Kandohla, of Ealing MPS, said additional measures were being taken following the daylight stabbing.
He said: "A Section 60 stop and search power has been authorised across Ealing and will be reviewed on an ongoing basis.
"This is to reassure residents and the public that the police are doing everything to tackle knife crime in Ealing."
Officers from Acton Central Police posted a message on Twitter about reassurance patrols in Northolt.
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