Crime reporter(wp/es):
A teenager was fighting for life in hospital and another man was injured after a double stabbing in north London.
Police were trawling the Turnpike Lane area for clues on the location of the stabbings on Friday morning after the 19-year-old arrived at a hospital in north London with knife wounds.
Scotland Yard said officers believed both men were stabbed during "a violent incident" near Waldegrave Road in the early hours of the morning.
Staff at the hospital alerted police after the teenager was admitted at about 1am.
He was transferred to a hospital in east London where his condition was described as life-threatening.
Emergency services were seperately called to Waldegrave Road to reports of a man stabbed at 12.50am. A 23-year-old man was taken to hospital with stab wounds not believed to be serious.
A Met Police spokesman said: "Detectives from Haringey CID are investigating.
"They believe the 19-year-old man was stabbed in the area of Turnpike Lane or Waldegrave Road.
"The 23-year-old man has been arrested on suspicion of attempted murder."
A crime scene was set up and parts of Turnpike Lane and Westbury Avenue were sealed off for hours as officers investigated.
Mark Humphris posted on Twitter: “Lots of roads closed around Wood Green, Turnpike Lane and A10 area. Police on scene.”
Enquiries continue to establish the full circumstances.