BUCKS COUNTY, Pa. (CBS) –– Investigators are trying to figure out what caused an overnight fire that destroyed a pizza shop in Chalfont, Bucks County.

Smoke poured out of Spatola’s Pizza Restaurant on the 400 block of West Butler Avenue, just before 2 a.m.

At least four fire companies put out the flames.

The inside of the building appeared to be charred.

No injuries were reported and no word yet on how the fire started.