All other workers at Fairborn Buick were accounted for after the collapse about 10:30 a.m., said police Capt. Ron Van Nuys. Police wouldn't immediately release the victims' names. The person who was killed worked in the dealership's body shop, Van Nuys said.
Firefighters completed their search of the building and were trying to secure it so they could recover the worker's body, fire Chief Rudy Weyland said.
``We'll take it slow now to make sure everything is secure,'' he said.
The second victim was at Miami Valley Hospital with injuries that weren't life-threatening, Van Nuys said.
The roof over the body shop collapsed as strong thunderstorms moved through the region. Authorities said they did not know if the building previous structural problems. No other buildings were affected.
A natural gas line leading to the dealership was damaged but authorities said the gas was turned off, along with the other utilities.