A 14-year-old girl is arrested and detained under the Mental Health Act following a knife attack at a school in north Manchester, police say. Multiple reports state that three people are stabbed during the incident, including two pupils and a teacher. Authorities describe the event as a serious incident, and say the school responds by placing the premises into lockdown. The girl is arrested by police and is later sectioned under the Mental Health Act, with details of the injuries and circumstances of the attack reported through police statements. The reporting also notes that the teacher is among those injured, though descriptions differ slightly about how the teacher was involved. Sky News says three people are injured, while other accounts specify the teacher and pupils as the victims. The girl remains detained under the Mental Health Act as investigations continue into the cause and context of the stabbing at the school.