A man in his 30s has been arrested by police investigating a stabbing in Enfield, north London on Tuesday, the Metropolitan Police has said.
The Met Police added that “work continues” to determine whether the incident is linked to incidents from the weekend, in which four people were stabbed whilst walking alone.
The attack on Tuesday morning was the fifth stabbing in four days.
A large police cordon was in place after a man, aged in his 30s, was left with life-threatening injuries after he was found stabbed in Aberdeen Road at around 5am.
In a statement, Scotland Yard said: "At this time police retain an open mind as to whether this incident is linked to the incidents in Enfield over the weekend. Police advise members of the public to remain vigilant and report any suspicious activity to police."
Police had previously described the suspect as a skinny black man who is approximately 6ft 3ins tall and wearing dark clothes.
At the weekend a 45-year-old woman was the first victim when she was stabbed once in her back at about 7pm on Saturday in Aberdeen Road, and left in a critical condition.
Then at 12.15am police were called to Park Avenue where a 52-year-old man had also been injured with a knife.
He has since been discharged from hospital.
The third attack was on a 23-year-old man just before 4am near Seven Sisters Tube station.
He is in a critical but stable condition.
The final attack occurred at about 9.40am on Sunday in Brettenham Road where officers found a 29-year-old man with a stab injury to the back.
His injuries are potentially life-changing but not life-threatening.