A voting location housing two polling precincts in battleground Gwinnett County, Georgia, was evacuated for about an hour today due to what police call a bomb threat.

The Mountain Park Aquatic Center, which houses two of the 156 county precincts, was evacuated at 12:44pm eastern time, according to the Gwinnett County Police Department.

“Upon speaking with employees and polling workers there was no suspicious activity seen and the location was re-opened,” police officials said in a statement to CNN.

A CNN crew observed normal activity at the centre, which is now re-opened. Voters CNN spoke to who are currently casting ballots were unaware of the earlier incident.

Sammy Baker, chair of the GOP in Gwinnett County, told CNN he witnessed police bomb-sniffing dogs going into the facility. He said the facility was shut down for “about an hour.”

Heather May, an investigator with the Georgia Secretary of State’s office, told CNN that she expects a motion to be filed with a judge to extend the voting hours at this location.