Police respond to an incident at Co-Op Academy in Manchester, where three pupils are stabbed. The school is placed in lockdown as officers attend the scene. Reporting states that a schoolgirl is arrested in connection with the incident. The accounts describe an active police response at the school site while staff and pupils remain secured. Details on the victims’ conditions, the motive, and the circumstances leading up to the stabbing are not provided in the available summaries. The incident prompts an immediate security response, with police managing the situation at the academy and investigating what happened. Authorities have not indicated in the provided information whether additional suspects are being sought or what charges, if any, relate to the arrest. The reports emphasize the location and the lockdown, and confirm the arrest of a girl following the attack on three pupils at the Manchester school.