A gunman opened fire in Atlanta on Friday afternoon, near the campuses of both the Centers for Disease Control and Prevention and Emory University, killing a police officer who was responding to calls of an active shooter, officials said.

Officers found the suspect with gunshot wounds on the second floor of a building that houses a CVS Pharmacy. He died from his injuries at the scene, Atlanta Police Chief Darin Schierbaum said.

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Here's what we know about the shooting.

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How did the the shooting unfold?

Schierbaum said 911 calls about an active shooter came in around 4

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