Lethbridge police have charged a 19-year-old man in connection with a sexual assault at the University of Lethbridge.

Police say the man, who is not a student at the university, left a dorm room where a group were socializing and walked into a 19-year-old woman's bedroom.

Authorities say he sexually assaulted the woman, who was not known to him, while she slept.

The man involved was charged with one count of sexual assault and is not allowed to go within 100 metres of the University of Lethbridge or have any contact with the victim.