Durham police say they have received multiple calls from students and parents about rumours of threats of violence at Dunbarton High School in Pickering and other area schools, but they have all turned out to be unsubstantiated.
The reports come after a female student allegedly walked into Dunbarton on Tuesday brandishing knives and wounded both staff and students.
Since then, students and parents have been calling in to Durham police that they have heard about further threats.
"We take all of these reports seriously," Jodi MacLean, spokesperson for Durham Regional Police, told CBC News.
"We want those who are hearing these rumours to know that they have been investigated and they have been found to be unsubstantiated."
The latest calls came in Friday morning, reporting potential threats against students at Dunbarton and one other high school in the area, MacLean said.
However, like the other reports, these threats were investigated and were unsubstantiated.
While the threats allege violence against students, they don't include specifics.
The girl, 14, faces numerous charges, including one count of assault, six counts of assault causing bodily harm, seven counts of assault with a weapon, and one count of possession of a weapon for a dangerous purpose.