Firefighters believe vagrants started the fire at the Cab Stand, so they're trying to make sure no one was trapped in the fire.
They can't safely search about 5% of the building on Philema Road.
They'll now turn it over to the owner, Pace Burt, who will have heavy equipment experts dig out the lower sections of the building.
Investigators found mattresses and sofas, evidence that vagrants were living in several rooms in the building.
The fire was reported about 3:30 Saturday morning, but Firefighters say it probably burned several hours before it was spotted.