Gunfire erupted in a crowded OH nightclub early Sunday after a personal dispute boiled over, killing one person and leaving 14 wounded as partygoers scattered into the night, authorities said.
The Cincinnati Police Department earlier said 15 people had been shot during the incident just after 1 a.m.at the Cameo Nightclub in the East End neighborhood, but he number was later amended to 16.
Police were interviewing multiple witnesses, he said.
"We are the region's Level One trauma center, so we prepare and train for situations like this and hope they never happen", Martin said.
Police also say there is no reason to suspect foreign terrorism.
Authorities believe a conflict began earlier in the day that led to the shooting, city manager Harry Black said in a news release. The officers attempted to give first aid to the victim who eventually died, Franz said.
Numerous victims taken to area hospitals have life-threatening injuries. "It's going to be a long night for our homicide unit to investigate", Neudigate said.
Cincinnati police initially said they believed at least two shooters were involved at the Cameo, but later Neudigate said on Twitter there was only one reported gunman, though police were still trying to determine if there were others. Some of the victims drove themselves to area hospitals, police said.
Mayor John Cranley called the shootings "unacceptable" and said authorities would work to find ways to prevent such violence.
Police officials described it as a "chaotic" crime scene, saying the club was completely packed.
Police Capt. Kim Williams told the AP there was "a lot of chaos, obviously, when shots were fired". One person was killed and 15 others were injured, including one who was "in extremely critical condition".
Ohio Gov. John Kasich bemoaned to CNN's "State of the Union" and host Dana Bash. "It (the club) has had some challenges in the past", Neudigate said.
Cameo's Facebook profile said it caters to college students on Friday nights, when anyone over 18 is allowed in, while Saturdays are "grown and sexy night" for ages 21 and older. There have been 71 in the U.S. this year, and in Cincinnati, there have been at least nine since 2013. It wasn't clear how many people fired shots.