A teenage girl has been detained for 15 years for stabbing two teachers and a fellow pupil during a knife frenzy at school.

The 14-year-old girl, who cannot be named for legal reasons, was previously found guilty of the attempted murder of teachers Fiona Elias, Elizabeth Hopkin and another pupil at Ysgol Dyffryn Aman in Ammanford, Carmarthenshire, on 24 April last year.

The defendant, who was 13 at the time, attacked teacher Mrs. Elias during the morning break using her father’s multi-tool, which she had snuck into the school.

Ms Hopkin stepped in to help her colleague, attempting to restrain the girl but was injured herself & received injuries to the neck, back and legs.

The teenager then moved on to stab another girl in the shoulder before being restrained by staff.

Ms Hopkin was airlifted to hospital after being stabbed in the neck, whilst Mrs Elias suffered stab wounds to her arms and hands.

The perpetrator had previously pleaded guilty to three counts of wounding with intent and a further count of possession of a bladed article on a school premises; But denied attempted murder.

Appearing before Swansea Crown Court, Judge Paul Thomas KC sentenced her to 15 years’ detention, of which half is to be spent on remand.

Sentencing the girl, the judge said he did not believe she had shown genuine remorse for her actions.

“I think you enjoyed the reaction and the publicity,” he said. “I don’t think you are genuinely sorry for what you did; you have said you are, but I don’t think that’s how you really feel.

Although the girl maintained she didn’t intent to murder her victims, a notebook found at her home contained ‘cruel’ drawings of Mrs Elias and reference to her fellow pupil she attacked, along with an admission that she would “commit the crime of a lifetime”.

The jury also heard she had told friends she was going to “do something stupid that could get me expelled” which may involve Mrs. Elias on the day of the attack.

During her trial, the court heard the teenager frequently brought a knife to school and had previously been suspended that term after Mrs. Elias found a knife in her bag.

CCTV footage played in court showed the girl talking to Mrs Elias and Ms Hopkin in the yard of Ysgol Dyffryn Aman, before brandishing her knife and launching a ferocious attack on the teachers.

As she attacked the first teacher, she was accused of yelling “I’m going to f*****g kill you”.

Moments later, the teenager would turn the knife on a fellow pupil, running at them and stabbing them in the shoulder. The attack ended when staff at the school wrestled the knife from the girl and restrained her.

Some 1,500 pupils at the school were placed on a lockdown as police rushed to the scene and paramedics treated the victims.

The girl is also said to have made a series of unsolicited comments whilst in the police, telling officers “I stabbed her – oopsies”.

“I’m pretty sure this is going to be on the news, so more eyes will be looking at me,” she said. “That’s one way to be a celebrity.”

She also asked, “are they dead?” and “how am I going to face my family after what I’ve done?”

During the trial, the girl told jurors she was sorry for the incident and could not remember large parts of what happened.

“It doesn’t sound like me. It doesn’t feel like something I would do,” she said.

During sentencing, the judge told her: “You will have been told by those representing you that you will have to be kept in a secure place, as you have been for nearly a year already. Even there, where you are at the moment, you are a danger to others, and you have made threats to someone.”

“What you did at school almost a year ago to the day has caused a large number of people a great deal of people harm and upset. It’s hugely affected many lives, including, of course, your own.”

“You tried to kill three people, two teachers and another pupil. You came to school that day planning to do that, as far as Mrs Elias was concerned.”

“I say this was planned – you knew you can’t take a knife, that you had been warned in the past, you never the less did so. You had it open in your pocket to attack Mrs Elias.”

“You wanted as many as possible to see what you planned to do,” he said. “What you thought of Mrs Elias, what you thought (the other pupil) might have done to you, whatever problems with bullying you had, none of that comes within a million miles of what you did or tried to do.”

In February, the judge said if she had been an adult, she’d likely be given a life sentence.

Addressing the judge, Caroline Rees KC, speaking for the defence, said the defendant’s maturity level was “low”, which was clear from psychiatric reports written ahead of sentencing.

Ms Rees insisted the girl, who she described as “a very complex young girl”, had expressed remorse as “best she can”, insisting that the doodling the girl had done throughout the trial was a way to help her cope, and that she was not being “disrespectful”.

She will have to spend 15 years in detention with half of it to be spent on remand.