A girl has been arrested after three people were injured at a school in Manchester.
She was arrested after they suffered knife injuries at the Co-op Academy on Plant Hill Road in Blackley.
The victims' injuries are not believed to be serious at this time, Greater Manchester Police (GMP) said.
Emergency services remain on scene and the force said officers were supporting the school, which has said it will remain closed until the end of the day.
There is not believed to be any wider threat to the pupils and staff, GMP added in a statement released just after 09:00 BST.
Peter Woods, the father of a year nine pupil, came to the school after getting a call about the incident.
He told BBC Radio Manchester: "You hear things on the news but it's always in other schools. You never think it will be in the school where your kid goes.
"For it to happen on your doorstep, it's terrifying."
Woods said he is concerned about sending his child back to class and wants to know what measures the school will have in place to prevent an incident like this from happening again.
Aureo Dombaxe said when he arrived at the school earlier to drop off his son he saw a "flood of police".
"We didn't initially know what had happened," he said. "When other parents informed me, it was heartbreaking."
He added: "You're always worried because you hear about knives at other schools - it is a worry when your kids go to the school."
A police presence remains at the high school.
Crowds that had gathered outside the gates have now cleared, with three police cars parked up on Plant Hill Road.
Co-op Academy and the Co-op Academy Trust, which is responsible for running the school, have been contacted for comment by the BBC.
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