U.S. officials continue to state that at least some of the bomb threats made to polling locations in multiple states appeared to originate from Russian email domains.

Axar.az reports that, citing CNN, however, the investigation is ongoing, and the FBI has yet to publicly confirm whether someone in Russia was behind the threats.

"The FBI said in their statement that it looks like these threats came from .ru domains," Jen Easterly, the head of the U.S. Cybersecurity and Infrastructure Security Agency, told reporters on Tuesday night.

The states that received these threats ,Michigan, Wisconsin, Arizona, and Georgia,evacuated polling places following the threats, some of which the FBI had previously confirmed originated from Russian email domains and were deemed non-credible.