Police were called to Thorpe St Andrew School at 10:24 GMT on the Wednesday of the attack

A teenage boy who had a hatred of women and an "obsessive interest" in killers has been found guilty of the attempted murder of a girl at his school.

The boy dressed in black and wore a face mask before stabbing the 15-year-old victim in the back at Thorpe St Andrew School, near Norwich, in March.

Armed police were called to the school, which went into lockdown, and the attack was caught on CCTV.

The boy, who is 16 and cannot be named for legal reasons, wrote notes about hating women and had an "obsessive and dangerous interest in killers and killing", jurors at King's Lynn Crown Court were told. He will be sentenced on 18 December.

Jurors deliberated for just under four hours before delivering a majority verdict at the end of a trial which began two weeks ago.

The teenager "went to school not to learn, but to kill" while armed with a kitchen knife, the prosecution said.

The school went into lockdown after the attack and there was an armed police response, while the girl was taken to hospital with a minor injury.

A photo taken from within a classroom showed an armed police officer at the scene

CCTV footage captured the moment the girl was stabbed in the back, before her attacker ran off while "pursued by a teacher".

The victim described to the jury how, in the aftermath of the attack, she had told a teacher "Sir, I've been stabbed".

In a police interview played to the court, the girl said she was in "panic mode" and felt numb and weak.

Chris Paxton KC, prosecuting, said it was "sheer good fortune" the "defenceless and vulnerable" pupil was not seriously hurt.

"This was a knife strike delivered, we the prosecution say, as an attempt to kill," he added.

He messaged his mother to say "I'm sorry" shortly after the attack, jurors heard.

The kitchen knife used to stab the victim had a blade measuring 18cm (7in) and was found in a wooded area

Paxton said that in a note written before the attack, the would-be killer had written: "I really want to do it, really bad, I hate having to wait."

The note continued: "Motive = misanthropy, misogyny, suicide, bullying. Weapon = knife x2? Death = 2+ hopefully, injuries a lot hopefully."

Jurors heard he had a hatred of women and an "obsessive and dangerous interest in killers and killing".

The boy, who was 15 at the time, had pleaded guilty to possessing a kitchen knife without lawful authority and wounding with intent, but prosecutors proceeded with the attempted murder charge.

The boy did not give evidence during his trial. Instead, his barrister argued he could not have intended to kill the girl because he used "limited force" with the blade.

Pictures shared with the BBC showed some children hiding underneath their desks in the aftermath of the attack

After the boy was found guilty, the judge Mr Justice Lickley warned him: "I'm sure you understand because of the very serious nature of the offence I will have to consider not only a custodial sentence, but one of some considerable length."

He nodded and replied "yes sir" before being led to the cells.

Det Supt Andy Hill, of Norfolk Police, said the incident was "unthinkable" and praised the victim's bravery in giving evidence.

"The resilience shown by the people involved has been truly something remarkable. This has had a deep impact on a lot of people," he said.

Owen Jenkins, chief executive of the Broad Horizons Education Trust, added: "We welcome today's guilty verdict, which reflects the seriousness of this shocking and deeply distressing attack.

"Incidents of this nature are extremely rare in schools, and our thoughts remain firmly with the student who was attacked and their family."

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