A teenage woman was injured by a knife-wielding attacker in the shadow of Alexandra Palace.
Both the victim’s conditions were described as non-life threatening by police.
There have so far been no arrests made.
A Scotland Yard spokesman said: “Officers attended along with the London Ambulance Service and London’s Air Ambulance.
“Two people, an 18-year-old woman and a man aged in his 20s, were found with stab injuries and taken to hospital. Their conditions were assessed as not life-threatening.
“Enquiries are ongoing to establish what happened.”
Anyone with information that could may the investigation is asked to call 101 quoting CAD 5579/04Jan. To remain anonymous contact the independent charity Crimestoppers on 0800 555 111.