Six people were shot in downtown Chattanooga late Saturday night, including two with critical injuries.
Mayor Tim Kelly on Sunday responded, "Last night, our city felt the terrible cost of gun violence. My heart is with the families whose lives have been upended by this horrific situation. Later today, I will address our community at a press conference. This is unacceptable - our city and our community will act."
The incident happened around 10:48 p.m. when multiple people began exchanging gunfire in the 100 block of Cherry Street.
Those injured were teens to early 20s.
Police blocked off streets in the vicinity as the investigation continued.
A person of interest was being interviewed. Police said there was no ongoing threat.
Those posting on social media said those at the scene were running and screaming. One posted a video showing a shoe of one of the victims.
Multiple police units and ambulances quickly sped to the chaotic scene.
One person reported hearing 15-20 shots in the vicinity of a group of some 20 teens and young adults.
Police said some of the victims may have been unintended targets.