SPRINGFIELD, Ohio — An incident involving a train is under investigation in Springfield. 

The mayor's office said Tuesday a freight train heading eastbound between Limestone and Water streets came to an abrupt stop, causing a grain spill.

Officials said no hazardous materials were released, but one hopper carrying wheat was compromised. Some of it ended up in a nearby waterway. Officials said the hopper was carrying 120 tons of wheat. 

Mayor Rob Rue said there isn't a threat to the public, but grain spills can affect ecosystems by reducing oxygen levels and disrupting water flow. The Environmental Protection Agency has been notified and is providing guidance, Rue said. 

Since some rail cars were carrying hazardous materials, hazmat teams responded to the scene and examined all cars to ensure safety. 

"It’s important to emphasize that no hazardous chemicals were released as a result of this incident," Rue said in a statement. "The rail line did sustain substantial damage, and cleanup and repair operations are expected to take time. We appreciate the public’s patience and will continue to provide updates as more information becomes available.” 

City officials and emergency crews are monitoring the situation, Rue said.