A shooting has taken place at a bar in Hamilton, Ohio, killing at least one person and injuring several others. The shooter is on the run, according to local media.

Police were dispatched to Doubles bar and nightclub at around 2am local time on Sunday, Dayton Daily News reported.

UPDATE: From @HamiltonOhioPD PD 1 dead, multiple other gunshot victims from Doubles shooting. More to come. pic.twitter.com/QaWW0ySToh — WHIOTV (@whiotv) July 24, 2016

The person killed was pronounced dead at the scene. His name has not been released, as police are in the process of contacting family members.

Crime scene unit still on scene at Doubles bar where 1 man is confirmed dead, others injured after shooting @FOX19pic.twitter.com/rJGweG5rU2 — Jordan Vilines (@FOX19Jordan) July 24, 2016

The gunman reportedly exited the bar through a back door and is on the run, NBC affiliate WLWT reported.

Ohio shooting: 1 dead, multiple casualties reported in Doubles bar https://t.co/ISkiG2S1Llpic.twitter.com/IijTYqtNBd — The Baptist (@Admitonesin) July 24, 2016

Police Chief Craig Bucheit said investigators are still working to determine the exact number of victims. Some were transported to hospitals by the local fire department, while others drove themselves.

He went on to state that the motive and number of shooters is so far unclear.

Witness Tolu Adeseha said he was inside the bar when he heard at least 15 shots go on for what "felt like hours."

#HAPPENINGNOW There's been a shooting in Hamilton @ the club "Doubles." Don't know # of victims/conditions. @WCPOpic.twitter.com/jnekpbxsrV — Kristen Swilley (@KristenSwilley) July 24, 2016

“It reminded me of things in the news, about people shooting and active shooters,” he said. “This [was] a reality for me, what do you do in an active situation.”

Hamilton PD CSI unit on scene. I have not seen homicide unit/coroner. @WCPOpic.twitter.com/mMQ1W7Kuxl — Kristen Swilley (@KristenSwilley) July 24, 2016

Adeseha said he saw multiple people with guns, but did not see anyone fire the weapons.

UPDATE: @HamiltonOhioPD: 1 man dead, several others shot at Doubles bar in Hamilton https://t.co/iLgqb3DI9qpic.twitter.com/gikuIh1fXj — Dayton Daily News (@daytondailynews) July 24, 2016

“You [had] people trying to play dead and things like that,” he said. “This is an active shooter and I was trying to tell a girl [next to me], you can’t cry, I know it’s traumatic for you, but you got to stay silent or play dead.”

At the scene of what is reported to be a mass shooting in Hamilton at Doubles bar pic.twitter.com/ma7E9sQttx — Mark Hauss (@thehaussman) July 24, 2016

Officers found shell casings both inside and outside the bar, WCPO reported.

Initial reports indicated that at least two people had been shot, with potentially more victims.

The site has been cordoned off by authorities.

Acknowledging that previous violence has taken place at the bar, Bucheit said: “What happened tonight tonight is unacceptable and we’re going to work with management and ownership to make sure it doesn’t happen again.”

Doubles bar was also the scene of a double shooting in August 2015.