Nine more students at Wilfrid Laurier University's Waterloo campus have tested positive for COVID-19.
Six of them live in the Clara Conrad Hall residence, where two floors are already under outbreak.
That outbreak declaration has now been extended to a third floor due to the new cases, meaning all students who live there are required to self-isolate.
Three other students who live in Laurier's Waterloo College Hall, King's Court, and 260 Regina Street residences have also tested positive for COVID-19.
Public Health is investigating and will notify any high-risk contacts.
A statement on the university's website said, "The Laurier community can rest assured the university has in place rigorous protocols for sanitizing and cleaning campus areas since the beginning of the pandemic."