BOULDER, Colo. (CBS4)– A fire destroyed a home in unincorporated Boulder County early Tuesday morning. It took crews from four different fire departments to extinguish the fire.

The fire started around 3:30 a.m. off the Peak to Peak Highway, north of Ward.

(credit: Boulder County)

No one was home at the time of the fire.

Investigators are working to determine what caused the fire.