A 16-year-old boy who prosecutors said expressed hatred for women and planned to kill multiple people has been found guilty of attempting to murder a 15-year-old schoolgirl in Norfolk, England.

The boy was convicted by a jury at King’s Lynn Crown Court on Wednesday after deliberating for three hours and 54 minutes over the stabbing at Thorpe St Andrew School on March 11.

According to The Independent, prosecutor Christopher Paxton KC told the court that the defendant went to the school armed with a kitchen knife, wearing black clothing and a face covering, with the intention of carrying out a planned attack.

The prosecution presented evidence of the teenager’s interest in fictional serial killers and notes allegedly written before the incident, which referred to misogyny, a planned attack on the school and a desire to cause multiple deaths and injuries.

Paxton described the defendant as having an “obsessive and dangerous interest in killers and killing”, while another note recovered after the incident reportedly contained the phrase “hatred for women”.

The court heard that police also discovered a handwritten list of names under the heading “victims” with a question mark, alongside other material investigators said was relevant to the defendant’s intentions.

The schoolgirl told the court that she initially thought the boy had touched her shoulder or punched her before realising she had been stabbed. She described becoming weak and numb as she struggled to open a door before reaching a classroom and informing a teacher that she had been attacked.

The girl was taken to hospital following the incident and was later discharged. The prosecutor told the jury that it was fortunate she had not sustained more serious injuries.

The school was placed under lockdown after the attack, while armed police responded to the incident.

The defendant had pleaded guilty to wounding with intent and possessing a knife at a school but denied attempted murder. He did not give evidence in his defence.

Following the verdict, Justice Lickley ordered the preparation of a report examining the teenager’s background and dangerousness ahead of sentencing.

The judge said he would consider a custodial sentence of considerable length, given the seriousness of the offence, and fixed December 18 for sentencing at King’s Lynn Crown Court.

The teenager remains in custody pending sentencing.