A man at the U.S. Capitol was arrested and several stated received bomb threats that were deemed non-credible, according to authorities.

Security experts stress that the nation's voting infrastructure is highly secure, and that isolated voting issues do not indicate widespread election fraud. For coverage of each race, see our election updates.

Vice President Kamala Harris visited a Puerto Rican restaurant in Reading, Pennsylvania, Monday night, accompanied by the state's governor, Josh Shapiro, and Rep. Alexandria Ocasio-Cortez of New York. He called that a "secret weapon for us" and said that volunteers were "knocking on 2,000 doors a minute in Pennsylvania over the weekend."

Most threats were unfounded, and officials assured the public of a secure election process despite unsubstantiated claims of fraud by Trump.

Five non-credible threats temporarily evacuated two Fulton County, Georgia, precincts for about 30 minutes each,” Fulton County Election Director Nadine Williams said at a morning news conference. “Thankfully, these locations are now operational again and all polling sites are secure with an active security presence,” she said.

Officials are on guard for equipment failures and software issues – as well as violent threats that have infected the democratic process.

Two polling stations had been evacuated in Union City and Fulton County due to the threats on Tuesday. Secretary Brad Raffensperger said officials were investigating but they do not believe they were viable.