The teenage boy who died in the Hainault sword attack has been named as Daniel Anjorin.
The 14-year-old died in hospital after Tuesday’s attack, in which four other people, including two police officers, were injured.
A 36-year-old man has been arrested on suspicion of murder.
Daniel went to Bancroft’s, the same independent day school where Grace O’Malley-Kumar, one of the Nottingham stabbing victims, attended.
In a statement, the Met Police said the suspect struck a 33-year-old when he crashed his van into a property on Laing Close. He then attacked the man, leaving him with a wound to the neck.
Another man, 35, suffered lacerations to his arm when he was attacked inside a nearby house.
Their conditions are not considered to be life-threatening, police said.
The suspect then went on to attack Daniel.
In a letter to parents, the school’s head teacher, Simon Marshall, wrote: “Naturally this event will have a profound effect on the whole school, but this will be especially true of his peers.
“It seems scarcely believable that less than a year on from the terrible death of Grace O’Malley Kumar in the Nottingham attacks we are facing fresh sorrow.
“All we can do for now is to look after one another and respect the privacy of Daniel’s family – it is a time of profound grief and as a community we will endure best if we come together in kindness and compassion.”
Jubilee Church, which Daniel was a member of, expressed their “immense sadness” at the “sudden and tragic death”.
Separately, the school where his mother works, Holy Family Catholic School, has issued a statement naming her as Mrs Anjorin.
It said: “It is with great sadness that I share with you the news of the death of the child of one of our staff members.
“Please keep Mrs Anjorin, her husband and their other children in your prayers.”
Her family have sent their condolences to Daniel’s family with her mother, Dr Sinead O’Malley, saying: “I don’t think there’s anything anybody can say that can really do anything to alleviate their hurt and their pain.”
A flag was seen flying at half-mast at Bancroft’s School on Wednesday.
During the attack in Hainault, four others, including two police officers, were injured.
A 36-year-old man was arrested on suspicion of murder.
The Met Police said he was injured and, due to his condition, had not yet been interviewed.
Daniel died from stab wounds shortly after being taken to hospital. His family are being supported by specially trained police staff.
Speaking to LBC, Met Police Commissioner Sir Mark Rowley said: “The first thing you have to say is for the parents involved, who’ve lost their 14-year-old, and that is just horrific, and it’s everyone’s worst nightmare.
“I’m sure we’re all thinking about them.”
Grace’s father Dr Sanjoy Kumar described the attack in Hainault as “horrific”.
Speaking to Good Morning Britain, he said the grief likely felt by his family was “only felt by a few like us who have lost children in these absolutely appalling circumstances”.
Her mother said she hoped the family would heal in time.
The O’Malley-Kumar family are from Woodford Green, east London, which is about 15 minutes by car from Hainault.
Officers were called to reports of a car crashing into a house and people being stabbed at about 07:00 on Tuesday.
On Wednesday, Sir Mark said two officers, male and female, suffered serious injuries to their arms in the attack.
The force added it was not looking for any other suspects and it did not believe the incident was terror-related or targeted.
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