One person was shot in the torso and another was shot multiple times during the event at Regional Park.
More than 1,200 people gathered for the event, geared toward encouraging teens to turn away from violence.
"All of a sudden, guys started tripping, a guy started shooting and kids got ran over," said Angel Easley.
"I thought it was a balloon pop, and I seen a dude with a red bandana and a gray hoodie, and I just ran," said Toriano Easley Jr.
Alfred Frazier, 17, and Sam ZayZay, 22, were arrested initially, police said. ZayZay has since been released pending further investigation. Frazier is accused of shooting with intent to kill.
Investigators are talking to two other people possibly involved in the shooting. The names of the shooting victims have not been released. Police have not indicated whether the shooting is gang-related.
Guns don't kill people. Morons do.
Anti Violence Rallies Don't Kill People- Whoa, not so fast.