CNN hosts Jim Sciutto and Poppy Harlow were reporting live Wednesday on a series of "potential explosive devices" sent to George Soros, Bill and Hillary Clinton, and the office of Barack Obama when an alarm forced them to abruptly cut to commercial.

Sciutto and Harlow were discussing the suspicious packages with CNN law enforcement analyst Tom Fuentes when a loud siren could be heard in the background of their New York City studio.

A suspicious package was reportedly discovered in the mailroom of the Time Warner Center -- which is home to CNN's New York headquarters -- prompting an evacuation.

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As Sciutto and Harlow threw to commercial, CNN staff could be seen in the background filing out of the newsroom.

"We're going to find out what the latest is here at CNN. We're gonna be right back," Sciutto said.

After the break, CNN began broadcasting from its Washington, D.C., bureau, and Harlow and Sciutto described the scene on the street outside the New York office.

The suspicious package was reportedly addressed to former CIA Director John Brennan, who is now an NBC News/MSNBC contributor and often critical of President Trump. 

"What we saw here today was an effort to terrorize," New York Mayor Bill de Blasio said at the scene. "This clearly is an act of terror."

The anchors then resumed their show from outside the building, using their cell phones to broadcast. 

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