Shortly after 9:30 a.m., Hamilton police said they were called to Sir Allan MacNab High School to investigate an alleged assault.
Const. Krista-Lee Ernst told CTV News Toronto that there was a “fight” between two students.
As a result of the investigation, police arrested a 16-year-old boy and a 17-year-old girl for “first-degree assault.”
“Several other incidents occurred and a 16-year-old was arrested for threats and a 36-year-old was arrested for disorderly conduct,” the news release states.
Police say the 36-year-old did not work at the school, but did not release additional information about her identity.
Just before midday, Sir Allan MacNab was placed under a Hold and Secure and at around 12:30pm, he was lifted.
The investigation is ongoing and police are asking anyone with information to contact them at 905-546-4925. Anonymous tips can also be left with Crime Stoppers at 1-800-222-8477 or online at