No, the Canada Border Services Agency detains those people. Here's an example that's in the news at the moment. The 492 people who came by boat to the west coast are all presently housed in correctional centres in British Columbia. In this case, given the number of people, we decided together with those in charge of the provincial centres to set up hearing rooms on the premises of the provincial facilities in order to review the detentions.
On December 16th, 2010. See this statement in context.