The Meridian Fire Department was called out about 10:00 a.m. Friday to Eastern Gardens Apartments.
Smoke was coming out of the roof when firefighters arrived.
Officials discovered that a fire in the ground floor apartment had spread out the window and into the attic above the upper apartment.
The upper dwelling had mostly smoke damage. The ground level and attic had the most damage from the flames.
No one was home. The investigation is continuing.