Police were called to Sunnyside Road around 3pm yesterday (October 25).
No casualties could be located at the scene but officers were later called to hospital where a man had taken himself in with stab wounds.
The man, aged 22, is in a life-changing medical condition.
Police arrested a 15-year-old on suspicion of attempted murder and he remains in custody.
Officers continue to appeal to the public for information about the incident.
Man, 22, in hospital with ‘life-changing’ injuries after stabbing in Islington
A Met Police spokesperson said: “On Saturday, 25 October at 14:56hrs police were called to reports of a stabbing on Sunnyside Road, Islington.
“Officers attended the scene and made enquiries. No injured party was located.
“Police were then called by medical staff after a 22-year-old man self-presented at hospital with stab wounds.
“His injuries are being treated as life-changing but not life-threatening.
“A 15-year-old boy has been arrested on suspicion of attempted murder and remains in custody.
“We understand the concern this has caused the local community and residents can expect to see an increased police presence in the area.
“Enquiries continue and anyone with information that may assist police is asked to call 101 quoting CAD 4199/25OCT25.”
