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Updated at 6:30 p.m. ET

Federal authorities expanded their nationwide search on Thursday for the person who sent a wave of suspected explosive devices to political nemeses of President Trump.

Ten devices addressed to eight targets have been intercepted or discovered, but no one has been hurt. It isn't clear whether or not the attack is over; the FBI said it can't rule out that more suspicious packages might still be moving through the mail.

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.