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Investigators are certain a fire that gutted a vacant northwest Salt Lake City house early Tuesday morning was human-caused, but whether it was intentionally set remained undetermined.

Salt Lake City Fire Department spokesman Jasen Asay said the 12:40 a.m. blaze at 671 N. Redwood Road was reported to 911 by several neighbors. Crews extinguished the flames within 20 minutes of arrival, but the property, valued at $100,000, was a total loss.

Inside, firefighters found both flammable spray paint and matches. The fire appeared to have begun in the southwest corner of the building.

Neighbors told investigators that both children and transients have frequented the house recently. The home had been vacant since at least 2008.

Investigators were on the scene throughout Tuesday in an effort to learn more about whether the fire was accidental, or arson.

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