ORANGEBURG - Investigators believe the massive brush fire that destroyed nearly 400 acres of land on Clauseland Mountain earlier this month was accidental.

Investigators say they have traced the fire's origin to a 10x10 area just below a popular hangout known as Tappan Zee Rock.

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"It could have been the campfire itself, it could have been people standing around the campfire smoking, throwing their cigarette butts one way or another,” says Rockland County Sheriff Lou Falco.

Falco says investigators won’t rule anything out until they know exactly who was under Tappan Zee Rock the day the giant blaze ignited.