ST. HELENA – A Friday fire destroyed a residence in St. Helena.

Cal Fire Battalion Chief Pete Muñoa said the fire was reported at 5:25 a.m. Friday on St. Helena Highway in the unincorporated area of Napa County.

Firefighters from Cal Fire, Napa County Fire, St. Helena City Fire and Calistoga Fire departments responded to the incident, Muñoa said.

Two people were at home at the time of the fire and safely evacuated prior to the fire departments' arrival. Muñoa said no injuries were reported.

The first firefighters on scene found the home to be fully engulfed, and went into a defensive attack in fighting the fire, according to Muñoa.

He said the fire destroyed the 2,500-square-foot residence and burned a small amount of vegetation.

The total damage estimated to the structure and contents is approximated at $700,000, Muñoa said.

Investigators from the Napa County Fire Marshal’s Office and Cal Fire believe the cause to be accidental but the fires still is under investigation, he added.