Numerous agencies responded to a fire at the Brin Building in downtown Menasha.
Crews have been on the scene since early Friday evening.
Fire crews tell NBC26 there is no cause for the fire, and at this point, there do not appear to be any injuries. They do not know if the building is salvageable.
They say they believe they will be on the scene until Saturday morning.
According to the Wisconsin Historical Society, the building once housed a theater, a bowling alley, a soda fountain. Now, it is stores and apartments.
The American Red Cross is responding. They report that Red Cross volunteers are providing water and immediate care for 10-14 residents impacted by the fire.
This is a developing story.