A fire in Taylorsville on Thursday night burned both units of a duplex and melted the siding off a third unit. It displaced at least six people, but no one was injured.

Unified Fire Authority spokesman Matthew McFarland said a report of the fire came in at 7:20 p.m. When firefighters arrived, one unit of the duplex, a car and a carport were engulfed in flames. The fire was spreading to the conjoined unit.

Investigators do not know what caused the fire.

The fire eventually took over both units and scorched the exterior of a third, not connected unit, McFarland said. Forty firefighters extinguished the blaze within 30 minutes of the 911 call.

McFarland said four people in the building at the time had left the home before firefighters arrived, and six people are displaced. Dogs and cats were also in the building. McFarland said all but one cat is accounted for. He said the occupants refused aid from the Red Cross and are being helped by friends and family.

McFarland said an investigation into the cause is underway and there is no damage estimate.