Police: Gunman wielded AK-47 inside Georgia school

The shooter barricaded himself in the school's front office with employees before eventually surrendering to police, DeKalb County Police Chief Cedric Alexander told reporters.

No one was injured, authorities said.

Suspected shooter Michael Brandon Hill, 20, faces charges including aggravated assault on a police officer, terroristic threats and possession of a firearm by a convicted felon, police spokeswoman Mekka Parish said.

The shooter fired approximately six shots from inside the school toward officers as they approached outside, Alexander said, and police returned fire, Kazinform cites CNN.

Police said it is unclear whether the suspect had any connection with the school, the Ronald E. McNair Discovery Learning Academy, which is about seven miles east of downtown Atlanta. Investigators believe the gunman entered the school behind someone, Alexander said.

As the standoff unfolded, a caller told CNN affiliate WSB's assignment desk that she was in the school office with a gunman.

The man had a message he wanted the woman to share with the local television station, assignment editor Lacey LeCroy said, describing the conversation during WSB's newscast Tuesday evening.

"She said he told her to tell me he was not afraid to die," LeCroy said.

The gunman also threatened to harm police, the woman said, according to LeCroy.

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