Girl, 14, detained under Mental Health Act after stabbing at Manchester high school

A 14-year-old girl has been detained under the Mental Health Act following a stabbing at a high school in Manchester earlier this week.

In case you need bringing up to speed, officers from Greater Manchester Police (GMP) were called to reports of a stabbing at a school on Plant Hill Road in Blackley – confirmed to be Co-op Academy Manchester – on Tuesday morning (9 June 2026), and when they arrived on the scene, they discovered that two students and a teacher had been injured.

A 14-year-old girl was arrested on suspicion of section 18 assault, before being taken into custody for questioning.

But it has now been confirmed by GMP that she has been detained under the Mental Health Act.

The three people injured during the shocking incident earlier this week have now all been released from hospital after being assessed.

As part of the investigation, GMP says it is are also ‘aware of and looking into’ social media posts in relation to the incident, but would like to remind the public not to speculate or comment, as this is an ongoing live investigation.

Offering the latest update on the investigation as it progresses, Jon Shilvock, who is the Chief Inspector of GMP’s City of Manchester North division, commented: “Our investigation has continued at pace since… we were first made aware of the incident, and our thoughts are with those that were injured and were caught up in the incident.

“Whilst the physical injuries were not believed to be serious, we know the impact to those that were involved or were witnesses to this will be significant, and we want to reassure our community we are taking this very seriously.

“As our investigation progresses, we are aware that names relating to the incident are being circulated on social media which are unhelpful for the investigation. This is also causing concern with the victims and those that have been impacted therefore we would stress that people do not speculate regarding this incident.

Read more:

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“Officers will remain in and around the area to provide support to ensure staff, students and the wider community feel safe.

“If you have any concerns, please speak to our officers who are there to support you.”

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