One person was killed and at least 13 people were injured after a gunman opened fire in a nightclub in Cincinnati, Ohio, during the wee hours local time on Sunday, reported WLWT5, a local TV station and the Cincinnati Police Department.

There is no information as yet about the identity of the attacker or even if he is in police custody. Some reports said he is still on the loose.

"It's a chaotic crime scene. We are in the middle of a very horrific situation that occurred at the nightclub with multiple victims," said Cincinnati assistant police chief Paul Neudigate. "It's going to be a long night for our homicide units to investigate." he added.

Cincinnati police have confirmed that it is a homicide investigation. Victims have been rushed from the Cameo Club to local hospitals and fire stations.  

"Many of the witnesses fled, but everyone that we can identify is being interviewed," said Neudigate.