TAUNTON, Mass. (WPRI) — An early morning fire is under investigation in Taunton.

Crews were called to a building on Spring Lane around 4 a.m.

According to Deputy Fire Chief Mike Sylvia, he says there was smoke initially coming from the first floor, but then spread to the back of the building.

Around 7 a.m., a 12 News videographer on scene saw heavy flames coming from the building.

Sylvia said about 40 people came out of the building, but said police do not have a record of how many people may have been living there.

Chief Timothy Bradshaw told 12 News, the city recently took action against the building’s owner to make sure no one was living in the commercial property, although he didn’t have specific details.

Bradshaw said that the fire department did inspect the building and found that fire alarms were working and there was a sprinkler system in place, however that sprinkler system was not up to code.

There were no injuries reported and there is no word yet on a cause.

Excavation crews were on the scene Saturday night knocking out parts of the former building walls, but before the entire building comes down, investigators will return on Sunday.

“State police are coming back at seven in the morning they’re going to bring a cadaver dog. Fire department and state police are going to make sure every room is empty,” Taunton Fire Lt. Gregory Galivan said. “Right now we don’t have any evidence of anyone being inside the building, but we don’t want to not search in case someone was left behind.”