Some were trampled, while others jumped out of a window to escape gunfire.
On Saturday morning, the ground outside the club was littered with glass and empty cups, according to an Arkansas Online reporter, who also saw a strobe light still working inside. "We will provide additional updates as needed", adding that one victim that was initially in critical condition had been upgraded to stable.
Police, who quickly assured the shooting was not related to terrorism, say the gunfire seems to have broken out as part of a dispute between clubgoers who were attending the concert by Tennessee rapper Finese 2Tymes at the Power Ultra Lounge.
Arkansas has experienced over a dozen drive-by shootings in the past week, although they're thought to be unrelated.
Tennesee rapper Finese 2Tymes was performing at Power Ultra Lounge when the shooting broke out. More than 24 shots were fired in an 11-second period.
Little Rock Mayor Mark Stodola said on Facebook that more information would be released at a news conference Saturday afternoon. "And government can do something to help us with that", the mayor noted.
Police cordoned off the block as crime-scene technicians gathered evidence from inside and outside the club.
Buckner said it was too early to provide details about the incident and that it could be multiple suspects.
A bystander's video broadcast by local media showed the crowded club at the moment gunshots rang out, followed by the sound of people screaming in the dark.
"Certainly during incidents such as this, emotions are very high".
The Bureau of Alcohol, Tobacco, Firearms and Explosives will be assisting the Little Rock police in investigating the shooting, officials said.
Little Rock's crime problem appears to be intensifying.
The shootings happened after a week of multiple drive-by shootings in Little Rock, though there's no indication they are connected. According to the Little Rock Police Department, the shooting occurred at around 2:30 a.m. local time, at the Power Ultra Lounge.
Promotional material for Hampton's Friday concert shows a man pointing a gun at a camera.
Courtney Swanigan said she and her sister were near the front of the club when the shooting erupted.