Mail and election ballots disappeared from at least eight mailboxes in a Millcreek neighborhood overnight between Oct. 14 and Oct. 15, Salt Lake County Clerk Lannie Chapman said.

Chapman told KUTV a handful of residents were affected and the stolen ballots have been canceled. The county is still working to contact everyone in the area and determine the full scope of what happened, she said.

The theft came the same day ballots arrived in mailboxes across Salt Lake County. Noelle Poulson, a Millcreek resident, said she picked up her mail around 5 p.m. on Wednesday, Oct. 14. When she stepped outside around 7:30 a.m. Thursday, Oct. 15, she saw at least eight mailboxes open and empty.

"It catches your eye when I walked out and I was like, 'Oh, that's a strange thing,'" Poulson told KUTV.

Neighbors then began comparing notes and realized their mail, including ballots, was gone. At least one neighbor tracked her household's ballots and confirmed they had been delivered on Oct. 14. All three neighbors KUTV spoke with had street-side mailboxes and had left their mail in the box overnight.

Poulson, who did receive her own ballot, chose to speak publicly on the neighborhood's behalf. She called the timing "highly coincidental," noting the mail vanished the same day ballots were delivered.

The ballots were gone.

Chapman said the incident was not related to the U.S. Postal Service and appeared to be a crime of opportunity. She said she worries the theft could prevent people from voting if they lack the option of going to the polls in person, according to KUTV.

The clerk said it is "physically impossible" for someone to cast a vote using another person's ballot. The county verifies each ballot using one of three identifiers: a Social Security number, a state ID or a driver's license. Ballots also go through signature verification, and any mismatch triggers a flag, Chapman said.

Poulson said she has not distrusted mail-in voting but is concerned about people trying to tamper with ballots.

Residents who have not received a ballot should contact the Salt Lake County Clerk's office. The original ballot will be voided and a replacement issued. Voters can also track their ballots at trackmyballot.utah.gov, according to ABC4.

Mail-in ballots must be returned to the county clerk's office or a county drop box by 8 p.m. on Election Day, Nov. 3.