Fire burned through a bedroom of a home in North Encanto early Friday.
San Diego Fire and Rescue said someone called about the fire on Springfield Street around 4 a.m.
The person reported something was thrown into the house that started the fire.
No one was hurt, but they say a family lived in the home.
The fire was put out within 20 minutes and it was contained to a single bedroom.
Check back for updates to this developing story.