Atlanta police also reported no suspicious activity. But officers were prepared for the possibility, the agency said.
"We have alerted the beat officers where CNN and other television broadcasters are located to be watchful for suspicious activity,” APD said in an emailed statement.
The CNN Center was beefing up security at its entrances, according to company President Jeff Zucker.
“We are putting up magnetometers at the entrances to the building,” Zucker said in a memo posted on Twitter. “We remain vigilant regarding security concerns across all of our global locations.”
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