At least one person has been killed and 14 others injured after at least two gunmen opened fire at a US nightclub.
Police have launched an investigation after the mass shooting at the Cameo Club in Cincinnati, Ohio.
It is not yet known how severely injured the other victims are.
Officials said the shooting is not being treated as terror-related.
The shooting took place around 1 a.m. when hundreds of people were reported to be at the Cameo Nightlife club, which the Cincinnati Police Department said has had "multiple problems" in the past.
"At this point it's unclear exactly what instigated the shooting," Captain Kimberly Williams said at a televised briefing. "We believe that there were at least a couple of shooters involved."
"Just a lot of chaos when the shots went off," Williams added.
The suspects were at large and police do not have good descriptions of them, in part because witnesses were reluctant to cooperate, Williams told WCPO.
The shooting comes less than a year after a gunman opened fire at a gay nightclub in Orlando, Florida, killing 49 people. It was the deadliest mass shooting in U.S. history.
The University of Cincinnati Medical Center has reportedly received eight patients from the shooting.
Four were stable, three were seriously injured and one other was said to be fighting for life.
Cameo Nightlife's Facebook page says it features "College Friday's" for students 18 and older and "Saturday's 21+ grown and sexy night."
The club, a large single-story structure, is a 7-mile (11 km) drive from downtown Cincinnati near the southeast corner of the city, the heart of the second largest metropolitan area in Ohio with more than 2 million residents.