DECATUR, Georgia - Police say the suspect in a shooting at an Atlanta-area elementary school is 20 years old and faces several charges, including aggravated assault on a police officer.

Krystal Dorris carries her four year old daughter Heaven after she was bused to a local Walmart following a shooting incident at McNair Discovery Learning Academy in Decatur, Georgia, August 20, 2013. An adult male was in custody after a gunman fired multiple shots at an Atlanta-area elementary school on Tuesday, police said. [Photo/Agencies]

DeKalb County Police spokeswoman Mekka Parish said in a statement Tuesday evening that the suspect in custody is Michael Brandon Hill.

She says he is also charged with terroristic threats and possession of a firearm by a convicted felon and is being questioned at police headquarters. She says no additional information was being released right now.

DeKalb County Police Chief Cedric L. Alexander said at a news conference that the gunman fired at least a half-dozen shots from inside Ronald E. McNair Discovery Learning Academy at police who were swarming the scene outside.

Officers returned fire. No one was injured.