Authorities said the voter registration offices of Orange and Riverside counties were closed Friday after receiving a bomb threat.

The threat was received early Friday morning but was determined to be “not credible” and no injuries were reported

Orange County’s elections office, where ballots were being counted, received a bomb threat Friday afternoon, the registrar said. Staff and members of the public who were watching ballots being tallied were evacuated from the Santa Ana building at about 6:45 p.

Election offices in Orange and Riverside counties were evacuated after each received bomb threats. No explosives were found in either building. Both threats were sent via email, authorities said. ABC News is reporting that these same types of threats have been happening at offices across the country.

The Riverside Central Counting Building was briefly evacuated after receiving a bomb threat, the county Registrar of Voters announced Friday night. Officials said the Riverside County Sheriff’s Office was immediately notified at around 6:40 p.

Registrars of voters' offices in Orange and Riverside counties were evacuated Friday evening after receiving bomb threats, but no explosives were located at either site.

Deputies evacuated the Orange County Registrar of Voters after it received a bomb threat at its Santa Ana office.

Bomb threats sent to polling places in at least five battleground states Tuesday targeted mostly Democratic counties, an NBC News analysis has found.