A bus appears to have burst into flames Monday morning causing a traffic headache for commuters on Interstate 75 northbound in Cobb County. Just before 7:30 a.m., Georgia Dept. of Transportation cameras showed the bus on the median with heavy smoke. The fire was extinguished by 8 a.m., but several fire trucks were blocking multiple lanes of traffic just south of Marietta Parkway. Authorities say there were no passengers on the bus and no injuries reported. By 9 a.m., the scene was clear.