MONTGOMERY COUNTY, TX --A brush fire is burning in southeast Montgomery County. The Montgomery County Sheriff's Office says the fire is at Sorters and McCoy near Porter in a densly wooded, unpopulated area between Spring Creek and San Jacinto River. Montgomery Co. Fire Marshal Jimmy Williams says the fire might have been caused by lightning. Ralph Cullom with Texas Forest Service says as of about 8:30pm the fire appears to be about 20 acres. It isn't contained but there is very little smoke and no large flames. He says there is a subdivision that appears to be about a mile or so away, and there is fire equipment at the edge of the subdivision in case the fire gets close. Cullom says about four area fire departments and the Texas Forest Service are at the scene. They're using two tractor plows to cut fire lines. Right now, no homes are threatened, and authorities are looking into the cause. No injuries have been reported so far and no structures are threatened. Stay with Eyewitness News and abc13.com for the latest. If you caught photos or video of this event, you can upload them at iWitness.abc13.com or email them to firstname.lastname@example.org.