Michael Thurmond tells The Associated Press that school officials are doing a head count to ensure all students at Ronald E. McNair Discovery Learning Academy are safe Tuesday.
Television footage shows students had been evacuated from the school and were sitting outside in a field. Buses are being brought in to take children away from the school.
Thurmond says he is not aware of any injuries.
Police are gathered at the school.
DeKalb County School Board Chairman Melvin Johnson told the Associated Press there were reports of shots being fired inside the building that houses students from pre-school to fifth grade.
A call to DeKalb County police was not immediately returned.