The FBI said many hoax bomb threats in several states appeared to originate from Russian email domains, though federal cybersecurity officials cautioned that the culprits were not necessarily Russian.

And the FBI warned that faked video clips were circulating on the internet telling Americans to “vote remotely” because of a terrorist threat.

Late-day bomb threats disrupted voting at several more polling sites in Georgia, prompting precautionary evacuations during the last window for in-person voting. DeKalb County, which encompasses part of the Atlanta area,