The shot apparently came from a homeowner in the neighborhood. At one point in the video, three men can be seen staring down protesters, one of them seemingly carrying a rifle.
After the shots ring out, some marchers can be heard trying to reason with the men.
Activist Frank Nitty, who documented the incident, can be seen in another video holding a person with a bloody shirt as they race to the hospital.
Two people are being questioned by investigators, according to local media.
*story by RawStory