LACROSSE (WKOW) -- Crews are still on scene of a fire in downtown LaCrosse, more than 12 hours after it began.
As of 11 PM Saturday, crews said the fire was knocked down, but not out. No word yet on the cause of the blaze.
It began as an attic fire at the 423 Jay Street building downtown.
Crews were called to the scene around 9:30 Saturday morning and blocked off Jay street between 4th and 5th streets.
La Crosse's Assistant Fire Chief Warren Thomas said the fire was spreading north to south in the attic space and there was also extensive smoke and water damage to the first floor.
The building's top floor also houses apartments....tenants were evacuated and no injuries have been reported.
Crews demolished one portion of the building after the roof collapsed.
The fire department also cut into neighboring buildings' roofs and sprayed water to keep the fire from spreading.
Officials say the fire is contained in one building, yet the neighboring former optical fashions building also has severe smoke and water damage.
More than 50 firefighters were on the scene, along with Tri state ambulance and the Salvation Army.