A Sydney high school in Guildford was placed into lockdown on Thursday after a student was injured in an alleged stabbing incident during the morning. Emergency services were called to Granville South Creative and Performing Arts High School on Rowley Road, where police and paramedics responded to reports of an injured student.

The injured student, reported by police as being 14 years old in initial reports, was treated by NSW Ambulance paramedics before being taken to hospital. A later local report identified the injured boy as 13 years old and said he had suffered a cut to his abdomen. He was taken to the Children's Hospital at Westmead and was reported to be in a stable condition.

Police said another student, also aged 14, was detained at the school before officers arrived and took him into custody. A knife was recovered and seized for further examination as investigators worked to establish exactly what happened.

The school was placed into lockdown while emergency services and police dealt with the incident. Staff instructed students to remain indoors while officers worked with the school to secure the area and begin their investigation.

Police later confirmed that no further incidents had been reported and students were safe. Officers remained at the school and were speaking with people involved as inquiries continued.

The incident has caused concern among parents and members of the local community. Parents gathered outside the school while the lockdown remained in place, waiting for information about their children. The incident has also renewed concerns about safety and violence within school environments.

The NSW Department of Education said violence of any kind is unacceptable in public schools and confirmed it was working closely with NSW Police. The department also said appropriate disciplinary action would be considered in response to the incident.

Police are continuing their investigation and are expected to speak with witnesses and others who may have information about the circumstances surrounding the alleged stabbing.

At the time of the latest reporting, no charges had been laid against the detained teenager. The investigation remains ongoing, and any allegations must be determined through the legal process.

For the Guildford community, the incident has been a major disruption to the school day, but authorities have confirmed that there were no further reported incidents and students were safe.