ESTES PARK, Colo. (CBS4) – Firefighters in Estes Park battled a house fire they say was possibly caused by a lightning strike Saturday afternoon.

According to officials the home was fully involved when firefighters arrived.

(credit: CBS)

(credit: CBS)

(credit: CBS)

(credit: CBS)

(credit: CBS)

(credit: CBS)

Nobody was home at the time and nobody was injured. The official cause hasn’t been released but witnesses said they heard a lightning strike moments before the fire started.

“I heard a couple of strikes and then we heard a loud one and I saw it before and I knew that it had to hit really close,” said Kris Chrastil, who was visiting Estes Park. “Went out the back door at first and didn’t see anything; came out the front and noticed the house was on fire.”

Fire officials said the home is a total loss. The homeowners live out of state and have been notified.