A lockdown at Chifley College Dunheved Campus in St Marys has been lifted.
The school was placed into lockdown at around 1.30pm.
It is understood a student arrived on campus armed with a knife.
A staff member at the school sustained a minor injury while trying to get the knife away from the student.
The lockdown lasted a little over an hour and it’s understood NSW Police attended the school.
“Please be assured all students and staff are safe. More information will be provided shortly,” the school said in a statement.
The Weekender understands the teen with the knife has been taken to hospital for assessment.
Troy Dodds
Troy Dodds is the Weekender's Managing Editor and Breaking News Reporter. He has more than 20 years experience as a journalist, working with some of Australia's leading media organisations. In 2023, he was named Editor of the Year at the Mumbrella Publish Awards.