A house in Volcano on Hawaii island was heavily damaged by fire Wednesday morning.

Twenty Hawaii County firefighters responded to the 9:36 a.m. alarm.

The first unit was on scene at 9:50 a.m. and found the back of the 1,800-square-foot, single-story wooden house with metal roof actively burning.

Gray smoke was spewing from broken windows and the roof line, the Fire Department said in a news release. The back of the house was charred and heavily damaged. The remaining interior of the house received heavy smoke and heat damage.

The fire was brought under control at 10:10 a.m. and extinguished at 11:15 a.m.

No one was home at the time of the fire.

Damage to the house, which was valued at $272,000, was estimated at $180,000.

A late model Nissan pickup truck also was damaged by the fire.

The cause is unknown and remains under investigation.