Local officials in Macon-Bibb County said a suspicious object that disrupted a campaign event Tuesday morning for Brad Raffensperger, Georgia’s Republican secretary of state and a candidate for governor, was not a bomb.

Mr. Raffensperger’s campaign announced shortly after the incident that his event, at a local airport, had faced an “active threat.” A bomb unit from the sheriff’s office of Bibb County was dispatched to the airport, and search dogs found a suspicious object inside a vending machine.

“After the thorough sweep of the airport, and further investigation, no hazardous devices were detected,” the sheriff’s office said in a news release. “There were no injuries reported at this location, and no staff or patrons were inside the airport when this object was found.”

Mr. Raffensperger, who is on a daylong campaign swing across Georgia that started with stops in Columbus and Macon, chose to continue the fly-around, which is scheduled to conclude Tuesday afternoon at the Atlanta airport.

“When you stand on principle, when you do the right thing, when you put people ahead of politics, not everyone will like it,” he said in a statement. “In fact, some people may try to intimidate you or do you harm.”

Mr. Raffensperger, who has been the secretary of state in Georgia since 2019, rose to prominence after the 2020 presidential election, when he rebuffed direct pressure from President Trump on a phone call during which the president pressed him to “find” enough votes to reverse Joseph R. Biden Jr.’s narrow victory in the state.

Ever since, Mr. Raffensperger has faced a relentless campaign of harassment and death threats against himself, his staff and his family. His family had to temporarily relocate after the 2020 election amid relentless threats, when members of a far-right militia group were spotted outside of his house. Months later, Mr. Raffensperger’s wife was still receiving death threats.

In 2022, Mr. Raffensperger ran for re-election and fended off a primary challenge from Representative Jody Hice, whom Mr. Trump endorsed as part of a campaign of political retribution in Georgia that also unsuccessfully sought to force out Gov. Brian Kemp. Mr. Raffensperger’s second term as secretary of state ends in January, and he cannot run again because of term limits.

A lifelong Republican, Mr. Raffensperger announced his candidacy for governor last year, entering a crowded primary field.

In a news release Tuesday, the sheriff’s office of Bibb County, which encompasses Macon, said a 911 dispatcher received a call at 8:21 a.m. Deputies and a bomb unit swept Middle Georgia Regional Airport, the site of the event. After the investigation was completed, the sheriff’s office said the airport had reopened.

Federal Bureau of Investigation agents were aware of the incident, but said it was being handled by the local sheriff’s office, according to an F.B.I. spokesman.

The rally was moved outside the airport.

“I’ll continue fighting for what’s right, and I’ll continue standing for Georgia — no matter what,” Mr. Raffensperger said in a statement. “At this time, that’s all I can say.”