PITTSBURGH -- A two-alarm structure fire in Ross Township overnight destroyed the Audio One Building at the corner of Babcock Boulevard and McKnight Road in Ross Township.

The fire marshal said the flames engulfed the building after 1 a.m. Tuesday and there was nothing they could do to save it or the contents inside. Investigators are still trying to figure out where the fire began and exactly what caused it.

Investigators said the building contained custom automobiles worth hundreds of thousands of dollars.

The owner kept a guard dog inside the business because merchandise inside the building was so valuable. Investigators said the guard dog was killed in the fire. No one else was injured in the fire.