Government numbers show that on any given day, an average of 360 inmates slept in bunks placed in spaces other than a cell.
Numbers also show that 233 cells in provincial correctional centres can be double-bunked and all of those cells have housed two inmates over the past three years.
New Democrat Warren McCall says the government needs to explain where the other inmates are sleeping.
Corrections Minister Christine Tell concedes there are overcrowding issues at the province's correctional centres.
Tell says lower-risk inmates are being kept in overflow space such as dormitories, classrooms, gymnasiums, chapels or other secure areas.
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