United States authorities have ruled out terrorism as the cause behind Sunday’s nightclub shooting in Cincinnati, Ohio. “What we know at this point in the investigation is that several local men got into some type of dispute inside the bar, and it escalated into shots being fired from several individuals,” said Cincinnati police office Eliot Isaac, according to Reuters.

The police said Cameo Nighclub, where the firing took place, had a history of gun violence. City Manager Harry Black said the last such incident at the club took place on New Year’s Day in 2015 and one in the parking lot in September that year.

Authorities have yet to identify and arrest the gunman, who killed one and injured 15 others in the incident. Isaac said one of the wounded was in “extremely critical condition”, and a spokesperson for a hospital said two other victims were in critical condition.

Cincinnnati Mayor John Cranley said the shooting was “unacceptable” and that authorities would work to find ways to prevent such violence in future. Ohio Governor John Kasich said he was “saddened to learn about last night’s shooting” and was offering the state’s assistance.

Investigators have requested the public to share any information they may have on the shooting. They are not examining footage from surveillance cameras, AP reported.