PULASKI, Wis. (AP) -- An investigation by federal, state and local officials into the cause of a fire that destroyed three buildings in downtown Pulaski is inconclusive.

Investigators interviewed witnesses, studied the buildings' construction, examined the fire scene, but say the cause of the Dec. 2 fire is undetermined. WLUK-TV reports authorities narrowed the origin of the fire to within or above the men's bathroom in the Wood Lanes bowling alley.

More than 30 area fire departments battled the blaze which destroyed three buildings and damaged two others.