PULASKI COUNTY (WSLS 10) - UPDATE: The Department of Forestry says the fire has burned approximately 25 to 75 acres, and they expect it to burn up to 100 acres.
No structures are threatened.
Authorities say they expect to be out for awhile tonight controlling the blaze.
The cause of the fire remains under investigation.
The Pulaski County Sheriff's Department has confirmed that crews are headed to what it calls a "fairly large" brush fire in the Allisonia area of the county.
Crews have not yet arrived on-scene.
This is a developing story, stay with WSLS for the latest updates.