Several pupils have been taken to hospital after collapsing at a secondary school in North Yorkshire.
Around 27 students displayed signs of sickness and feeling faint at Outwood Academy School in Ripon.
Emergency services have been rushed to the school, with police officers, ambulance and fire crews and hazardous materials specialist officers currently at the scene
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.
A spokesperson confirmed that the emergency services are continuing to work together in an attempt to determine the cause of the incident.
A spokesman for North Yorkshire Fire and Rescue Service said 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.”
A police spokesman explained: “Police were called at around 12.30pm on Wednesday 11 November, to reports that a number of students had collapsed at the school and a number of others had taken ill.
“It is believed the incident happened sometime between 11am and 11.30am.
“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.”