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Two Georgia correction officers have resigned after a photo of a beaten teenage inmate with a leash around his neck was posted on Facebook, apparently with a contraband cellphone, officials said Monday.

Authorities also said two prisoners involved in the March 27 incident were transferred out of the Al Burruss Correctional Training Center and the victim, Cortez Berry, is now in protective custody at another state prison.

The Department of Corrections did not disclose the officers' names or say whether they faced discipline before resigning.

Berry's family told NBC News last week that when they saw the disturbing pictures posted on Facebook and went to the prison to investigate, the guards were unaware that he had been beaten.

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The relatives were horrified that Berry was initially transferred to Smith State Prison, a notoriously violent lockup. Correction officials portrayed that as an emergency stopgap measure.

Berry is now within protective custody at Macon State Prison, the agency said in a statement. "In our continued efforts for the safety of our inmates, the Department transferred the other two inmates involved to other facilities. Additionally, both supervising officers involved in the incident have resigned."

The incident is still under investigation, the statement said.

Berry was imprisoned at Burruss for violating probation on charges of juvenile aggravated assault, robbery and car theft.

He told his aunt that the day before his 18th birthday, a group of fellow inmates tried to get him to join a gang called the Gangster Disciples, and when he refused they attacked him and took the photo.

"No guard was there to help him," the aunt, Shavondria Wright, told NBC News. (Corrects name to Shavondria Wright)

The case highlighted both violence in Georgia prisons and the growing use of smuggled cellphones by inmates, sometimes to commit crimes.

This picture was allegedly taken inside a Georgia correctional facility and posted on Facebook. The aunt of the man shown leashed in the picture, Cortez Berry, said the family got a phone call when it turned up on the social media site. She sent a screenshot to NBC News. Berry was 17 at the time the photo was taken. The faces of the men with Berry have been blurred by NBC News. NBC News

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