Via CNN.com:

A gunman shot a woman today at Atlanta's CNN Center. CNN employee Brad Lendon saw the shooting at the Omni Hotel, which is part of the CNN complex. Police have a suspect in custody. The woman's condition is unknown. Lendon saw a woman on the ground next to a potted plant near a back entrance to CNN.com newsroom. A man stood over her "and fired at least two shots into her," he said.

UPDATE: One confirmed dead.

UPDATE #2: Were MSNBC producers told to ignore CNN shooting?