CNN's NYC offices given all-clear after bomb threat

Police and CNN issued an all-clear after a bomb threat Thursday night at the news network's New York City offices and studios.

"The NYPD has now given us the all clear, and employees have been permitted to return to the building," CNN Worldwide President Jeff Zucker said in an internal memo to staff. "The building is secure and safe for everyone to return in the morning."

The New York Police Department tweeted the threat was not substantiated.

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