Three people were stabbed, according to Halifax, Nova Scotia police, in a Monday morning altercation at a high school.
Three people were hurt, according to a statement from Halifax Regional Police, and they were all taken to a hospital for treatment.
Unknown is the degree of their wounds.
At around 9:31 a.m., police detained one person—a young person who attends the school.
Officers in Bedford, Nova Scotia, a suburb of Halifax, are still searching the school.
The school has been closed for the remainder of the day. Police and school board officials are working with school administration to safely release students and staff from the property.
The incident comes nearly three years after a mass shooting that killed 22 people, unfolding over the course of 12 hours between April 18 and 19.
Of the 22 people killed, 13 were shot and nine died in house fires, Royal Canadian Mounted Police said.