LAWRENCEVILLE, Ga. -- The Democratic National Committee is apologizing after one of its campaign buses reportedly dumped raw sewage on a Gwinnett County street.

Officers were called to the O'Reilly Auto Parts store on Grayson Highway Tuesday morning after someone reported seeing a DNC "Forward Together" bus draining its waste on the road and into a storm drain. A store employee captured photos of the incident.

PHOTOS | DNC bus dumps raw sewage on street

A responding officer said a large amount of drying toilet paper was on the roadway where the RV had been and a "foul smell" was left in the air.

A DNC spokesperson issued a statement Tuesday evening saying:

“This was an unacceptable mistake and we apologize to the Lawrenceville community for any harm that was caused. We are taking corrective action with the charter bus company to prevent this from ever happening again and contacting local officials to determine the best course of action.”

Later Tuesday night, the DNC spokesperson issued a second statement explaining that the driver saw the sewage container for the bus was starting to leak because it was full. The spokesperson said the driver was concerned the bus would have to drive a substantial distance while leaking sewage, putting more cars at risk, leading him to make the decision he did.

Gwinnett County Fire Hazmat units cleaned up the spill.

The bus, which sports a photo of Democratic presidential nominee Hillary Clinton and running mate Tim Kaine, was in town for an early voting event.

According to a news release, the bus is "campaigning in Georgia to provide additional support for Hillary Clinton and to promote Democrats up and down the ballot." It's scheduled to be in Atlanta for a presidential debate watch party Wednesday.