According to the Fond du Lac Fire Department, the fire started around 9 a.m.
Officials believe the fire started outside the building.
They say the fire spread between two structures.
The flames started on the first floor, spread to the second floor and up through the attic.
Two people were taken to hospital.
The cause of the fire is under investigation.
Copyright Copyright 2014 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.