By Jennifer McRae

THORNTON, Colo. (CBS4)– Firefighters in Thornton rushed to a burning home at 13283 Columbine Circle on Friday night. When crews arrived, they found the home engulfed in flames.

(credit: Thornton Fire)

There was concern that the fire had spread to two neighboring homes.

(credit: Thornton Fire)

The fire was upgraded to a three-alarm fire with additional resources from Westminster, Adams County and Federal Heights firefighters among other stations.

What caused the fire is being investigated.

Jennifer McRae