Mail-in ballots in an official drop box were damaged by fire over the weekend in Los Angeles, while a Long Beach vote center was reported as vandalized, though police said the broken glass didn’t appear to be tied to the elections.

In advance of Tuesday’s statewide primary election, the Los Angeles County registrar’s office and law enforcement officials were looking to find the perpetrator.

“Any attempt to interfere with voting or election operations is taken seriously,” Dean Logan, who oversees the registrar’s office, said in a written statement. “We will continue working closely with law enforcement and other partners to safeguard the voting process and ensure voters can participate with confidence.”

Election workers responded Sunday morning to a voter center in Cesar E. Chavez Park in Long Beach, where vandalism was originally suspected.

Long Beach police officers found a section of a broken window but didn’t believe it was connected to any targeted vote center vandalism, they said.

In Los Angeles during a ballot collection, election staffers found mail-in ballots that appeared to be burnt in an official drop box at the Los Angeles County Department of Public Services-Civic Center location in the Arts District.

Elections officials believe the damage affected a small number of ballots and occurred between Saturday’s collection and the following morning.

The registrar’s office reported the damage to Los Angeles police. The registrar did not say how many ballots might have been destroyed.

County officials said they would contact any voters they could whose ballots were damaged to lay out available options, including replacement ballots, if needed.

Voters who are concerned about whether their ballot was compromised can check on its status with the California secretary of state’s Where’s My Ballot tool at california.ballottrax.net. Voters input their name, date of birth and ZIP code.

Voters can also check on their ballot’s status with the county registrar of voters at lavote.gov/av inquiry. Voters will need to input their last name, birth date and house number.

The registrar’s office encouraged residents to report suspicious activity involving election materials and facilities or other voting operations to 1-800-815-2666, option 2.

Reporter Kaitlyn Schallhorn contributed to this report.