Firefighters responded to large blaze at an abandoned building in Norwood, Massachusetts, overnight Wednesday.
The fire broke out just before midnight on Davis Avenue.
Norwood Police said the building, which has been abandoned for several decades, was fully engulfed when they arrived.
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Crews from Westwood, Canton, Walpole and Sharon responded with mutual aid.
There were no injuries.
There is no word yet on what sparked the fire; however, the state fire marshal's office says that while it's likely the fire's start had some human involvment, investigators are still determining if it was accidental or intentional.
The state fire marshal's office says it's possible homeless people had gained access to the building.
Anyone with information is asked to contact investigators at 1-800-682-9229.