Several pupils have been taken to hospital after collapsing at a secondary school in England.
Around 27 students displayed signs of sickness and feeling faint at Outwood Academy School in Ripon, North Yorkshire Police said.
It is not yet known what caused the students to fall ill but local reports suggest 23 pupils have collapsed and emergency services remain at the scene.
The incident is believed to have happened between 11am and 11.30am.
A police spokeswoman said: “Approximately 27 students have been affected who have displayed signs of sickness and feeling faint. Some have been attended to by paramedics at the scene and others have been taken to hospital.
“At this stage it is not known what has caused the students to fall ill and officers are working with the fire service to establish what has caused the incident.”
Outwood Academy has 635 students, aged from 11 to 18.
Police initially responded to reports that a number of students had collapsed at the school and a number of others had been taken ill.
Emergency services have been rushed to the school, with police officers, ambulance and fire crews and hazardous materials specialist officers currently at the scene
A spokesman for North Yorkshire Fire and Rescue Service confirmed specialist hazardous materials officers are at the school.
“North Yorkshire Fire and Rescue Service received a call at 12.21pm to reports of a number of pupils feeling unwell at the Outwood Academy in Ripon,” the spokesman added.
“Crews from Ripon and Boroughbridge are at the scene alongside hazardous materials specialist officers.
“A specialist detection, identification and monitoring team from West Yorkshire Fire and Rescue Service is also at the incident.
“A number of students have been affected who have displayed signs of sickness and feeling faint. Some have been attended to by paramedics at the scene and others have been taken to hospital.
“We are working with colleagues from North Yorkshire Police and Yorkshire Ambulance Service at this time to determine what has caused this occurrence.”