An arson investigation has gotten underway after authorities said a burned backpack was found.
The incident began around 11:45 p.m. Thursday when a citizen was walking his dog and heard a man talking to himself and yelling on the steps of Riverfront Park.
Authorities said the citizen heard what he thought was an explosion a short time later, and the man who had been on the steps ran off.
Officials responded to the scene and said there was no sign of an explosion; however, a burned backpack was found in that area.
The Hazardous Devices Unit was called in as a precaution, and they confirmed no explosion took place.
The incident has been under investigation as an arson. Only the backpack was damaged.