Police were called to a restaurant on Highgate Hill at around 1.20am today (December 1) after a stabbing on nearby Macdonald Road in Archway.
Officers arrived with paramedics who treated the victim for a stab wound to the arm.
He was rushed to hospital where his injuries have been assessed as not life-threatening or life-changing.
There have been no arrests and a crime scene is in place on Macdonald Road and Highgate Hill.
Pictures show blood on the floor of McDonald’s outside Archway station.
The store was closed after the stabbing and the entrance was closed by police tape.
It has since reopened.
Police are appealing for anyone with information to come forward.
A Metropolitan Police spokesperson said: “At 01:21hrs on Monday, 1 December officers and the London Ambulance Service were called to a restaurant on Highgate Hill, Islington following reports of a stabbing that took place nearby on Macdonald Road.
“One victim, a man in his 40s, was treated by paramedics for a stab wound to the arm and taken to hospital.
“His injuries have not been assessed as life-threatening or life-changing.
“A crime scene has been opened along Macdonald Road and Highgate Hill as officers continue to make enquiries.
“No arrests have been made at this early stage.
“Anyone who has information that may help police with their investigation is asked to contact police on 101 quoting ref CAD 0365/01DEC.
“Alternatively, you can contact Crimestoppers anonymously on 0800 555 111.”
