Published: Aug 27, 2013 7:13 AM EDT
Updated: Aug 28, 2013 10:08 AM EDT

NAPLES, Fla.- A Collier County restaurant burned to the ground this morning. Investigators have ruled it as arson. The fire marshal is offering a $2,500 reward for the identity of the suspect.

Nana's Diner on Collier Boulevard caught fire just after 4:00 a.m.

The two-story building housed a woman in an apartment above the restaurant. She was inside when her fire alarm alerted her there that something was on fire. The Golden Gate fire chief is crediting that smoke detector for doing it's job and saving her life.

The fire chief said the building went up in flames very quickly. The restaurant and the apartment are a total loss. However, there are two other businesses that share the building, and the fire department said they have signifcant damage.

A patron who has been coming to the restaurant for 30 years said this is a devasting loss to the communty.  

There were 46 firefighters fighting this fire. The state fire marshal is on the scene piecing together what exactly happened. The America Red Cross is assisting the woman who lost her home.