MOUNT CARMEL - Fire investigators were unable to find the cause of the blaze that gutted the former Lapinski Lumber Company early Sunday morning.

Mount Carmel Borough Fire Chief James Reed said Monday he and Pennsylvania State Police fire marshal Kirk Renn spent close to three hours in the morning looking over the fire scene.

"There were a number of issues that we found, but there was no clear indicator on what started the blaze," Reed said. "Due to that, we are ruling the cause to be undetermined."

Fire struck the former business at approximately 12:35 a.m. when flames ran through the second floor of the building, located at 236 S. Seventh St.

The heaviest damage occurred in the center of structure, gutting its former storeroom/showroom and an office area.

Owner Robert Lapinski stated that nothing of value was damaged in the fire, but that he was not insured for the loss. Lapinski started the business in 1948 and built the building involved in 1960. The company closed its doors in 2002.