WESTPORT — A fire apparently sparked by an electrical source at a Rocky Ridge Road home Tuesday was quickly extinguished by firefighters.

Fire crews were dispatched shortly after 3 p.m. Tuesday to the scene, where flames were visible at the “front right corner” of the two-story dwelling, according to the report by Assistant Fire Chief Philip Hessberger.

Fire Co. 1 discovered the blaze spread inside to a second-floor bedroom.

Electrical power to the structure was cut, and the fire was doused with no injuries to either firefighters or the homeowner.

Westport Fire dispatched four engines, a truck company and the shift commander to Rocky Ridge Road, while Fairfield and Norwalk firefighters provided mutual-aid coverage for the rest of town.

An investigation by the Fire Marshal’s Office later determined the cause of the fire was electrical, the fire report said.