There were a couple of disturbances during mid-term exam week at two campuses of York University on Monday.
The Glendon campus was evacuated in the morning after a reported bomb threat.
Officials say the threat came in the form of graffiti in a bathroom.
Security decided to evacuate the building while officers were on their way to the school.
Police have now cleared the scene, adding that they have received these kinds of calls in the past during exam week.
Officers were also called to the main campus of the university on Monday after a report of a bullet going through a library window.
School officials say it turns out it was a thrown bottle that caused the damage, not a bullet.