San Antonio firefighters are trying to determine what started a fire inside a home on the West Side Thursday night.

The fire started around 9:20 p.m. in the attic of a home in the 9500 block of Quicksilver Drive.

Firefighters contained the flames quickly, but remained at the home for more than an hour to put out hotspots.

An arson investigator was called to determine the cause of the fire. No injuries were reported and no one was inside the home when the fire started.

Damages were estimated at $100,000.