The pupil was attacked at Thorpe St Andrew School at about 10.20am on Wednesday.

She has since been taken to the hospital with "minor injuries".

A 16-year-old boy has been arrested on suspicion of causing grievous bodily harm with intent.

Here is everything we know about what happened at the school so far.

School plunged into lockdown

Armed police outside Thorpe St Andrew School. (Image: Newsquest)

Police were called to reports of a stabbing at the school at 10.24am on Wednesday.

Pupils were told to hide under desks and the school bell could be heard ringing out across the site.

It is understood that teachers told pupils not to go on their phones at the time.

LIVE COVERAGE: Live updates as school in lockdown after teen girl stabbed

But after being in lockdown for more than an hour, pupils were then allowed to message their families.

A student at the school, who managed to make contact with their family via text message, said: "I am very scared".

Another pupil said that they "just want to go home".

A photo of an armed officer inside the school. (Image: Supplied)

Footage from the scene showed an ambulance with its back doors open, parked on the school grounds.

The vehicle was being guarded by an armed officer. What is understood to be a teacher, wearing a pink high-vis jacket, was also standing by.

Students can be heard shouting in the background of the clip.

Suspect on the run after 'jumping fence'

Police outside the school this morning. (Image: Newsquest)

At 11.34am, police announced that the suspect was on the run and that the victim had suffered "minor injuries" as a result of the attack.

It is understood that the suspect jumped over the school fence at the south site entrance in Laundry Lane when fleeing the scene.

A "thorough area search to locate the suspect" was then launched.

Police outside the school this morning. (Image: Newsquest)

Less than 20 minutes later, at 11.55am, officers announced that a 16-year-old boy had been arrested near the school on suspicion of causing grievous bodily harm with intent.

He has been taken to Wymondham Police Investigation Centre for questioning, where he remains.

Broad Horizons Education Trust, of which the school is a part, has been contacted for comment.

Attack 'not believed to be connected to hate crime'

Thorpe St Andrew School is currently facing serious questions after a visiting group of Jewish boys reported suffering antisemitic abuse during a football match.

An under-15 team from the Jewish Free School (JFS), in London, was playing in a national cup quarter-final at Thorpe St Andrew School last Thursday when the shocking scenes unfolded.

JFS pupils claim they were told to "go back to the gas chambers" and were called "dirty Zionists" by the crowd, which was said to be mostly comprised of pupils from the Norfolk school.

But a spokeswoman for Norfolk Constabulary said the stabbing is not believed to be linked to the antisemitic abuse.

© Norwich Evening News