A school in Wigan was closed after a member of staff was taken ill and airlifted to hospital.
Paramedics rushed to The Deanery High School, on Frog Lane, just after 8.50am on Monday following reports of a man feeling unwell.
A number of ambulance vehicles attended and the staff member was taken to hospital in an air ambulance.
Students were kept in classrooms.
The school posted a message on Facebook to let parents the school would be shut for the rest of the day.
It read: "A member of staff has been taken very ill. So as not to cause distress to pupils they have been in their classrooms whilst the air ambulance and emergency services have been on site.
Read more of today's top stories
"Many staff have supported in the incident. Unfortunately we will have to close school as most staff have been affected. If any pupils needs to stay, supervision will be on hand.
"If any pupils need support, the clergy are on hand. We hope to be open as usual tomorrow.
Dramatic pictures show the moment a young girl with a knife is arrested in Piccadilly Gardens
"Please keep the member of staff and his family in your thoughts and prayers. If you do not want your child to be dismissed from school, then please contact school immediately."
A spokeswoman for the North West Ambulance Service said: "We were called at 8.51am to the school. We have taken a patient to hospital by air ambulance.
"We sent a number of resources - two ambulances, a rapid response vehicle and the air ambulance attended."
