Omaha Fire Investigators now look for the cause of a early morning fire.
They say firefighters went to 21st and Paul Streets around 3:30 a.m. in response to an automatic fire detection alarm.
Firefighters saw smoke as they pulled up, and asked the 9-1-1 Communications Center for more firefighters to be dispatched.
Investigators say the fire was then extinguished quickly.
The structure was occupied at the time of the fire.
No injuries are reported.
(Picture from Omaha Fire)