Updated at 9:38 p.m. ET
At least seven suspicious packages containing what the FBI called potentially destructive devices have been sent since Monday to several leading Democratic Party figures and to CNN in New York, triggering a massive investigation.
Authorities have yet to release any information about a possible suspect or suspects but, in an interview on CNN, New York City Police Commissioner James O’Neill said investigators are reviewing security video footage for clues as to who left the envelope at the network offices, the Associated Press reported.
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