Peel Regional Police are warning anyone living in the University of Toronto’s student housing in Mississauga to be on alert after a sexual assault on campus. 

Police say a 19-year-old student was sleeping in her first-floor dorm room on Monday night when someone climbed in the window. 

The woman woke up and confronted the man, who then sexually assaulted her and fled, said Const. Fiona Thivierge. 

The suspect is described a white male in his 20s, about 5 foot 5 inches tall and wearing a hoodie and a knit hat.

“The thing with living in residences is a lot of the dorm rooms are on ground level,” Thivierge said. “We would just caution any student, or anybody living in the area for that matter, to make sure you lock your windows.” 

University of Toronto at Mississauga spokeswoman Jane Stirling says students have been advised to be extra cautious in the aftermath of the assault. 

"We are increasing  our campus police patrols. We're doubling the number of patrols around the town house residences, Peel police are also regularly patroling the residences," Stirling said. 

Police say they are reviewing video tape from the campus and are canvassing the area.