Early morning house fire in Bullhead City under investigation

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BULLHEAD CITY -- Firefighters in Bullhead City are trying to determine what sparked a huge house fire in a vacant home early Monday morning.

Crews arrived on the scene just before 3 a.m.

Once firefighters determined there was nobody inside the house, they decided to stay outside and fight the flames defensively.

The home was vacant and did not have any utilities. Firefighters said when that's the situation, it's rare that a fire is accidental.

Investigators are working to determine the exact the cause of the fire.