TULSA, Oklahoma -- A small fire in an office building about a block east of 60th and Sheridan sustained heavy smoke damage early Tuesday morning.
Tulsa Fire got the call just after 2 a.m.
When they arrived on scene, firefighters didn't find anything.
After giving the office building a closer look, they noticed lots of smoke inside on the first floor.
Firefighters were at the scene for over an hour, clearing the building of the smoke.
Cause of the fire in the building remains under investigation.