Michael Osborne knew something was wrong when he pulled up to his polling site in battleground Georgia, taking in all the EMS and police vehicles around the building, CNN reports.

However, he never expected it would temporarily halt voting at this location in Fulton County’s Union City. An officer told Osborne and other voters they couldn’t enter the site to vote because of a bomb threat.

Osborne said the nearly hourlong delay at Etris Community Center, near Atlanta’s Hartsfield-Jackson International Airport, left voters waiting outside until law enforcement cleared the building.

“Three voters were mid-vote when it happened and probably about 25 people in line,” said poll watcher Evette Reyes.

“To their credit, most people stayed because they took the day off and weren’t deterred,” Osborne said. But the 49-year-old tells CNN other voters did leave. “It’s unfortunate. I know Georgia is a swing state, we were told to be prepared for potential happenings on Election Day itself, but I never expected anything like this to happen.”

Read more here.