HARRIS COUNTY, Texas -

The Harris County fire marshal is investigating a house fire near the Katy area.

Firefighters with the Westlake Fire Department arrived around 11:45 p.m. Friday to the house at South Navaho Trail and Snake River Road.

The house's roof caved in not long after firefighters arrived at the scene.

Four people were inside the home but they all made it out safely.

The homeowners believe that fireworks may have been the cause of the fire.