The City's fire service still doesn't know the cause of an early morning garage fire on the city's North side. The fire occurred just before 4:00 a.m. this morning at the corner of Carrie Street and Kenogami. One unit was called out to fight the fire which was extinguished quickly. One fire official says they were able to prevent the fire from spreading to a near by residence which suffered only minor melting of the siding.