Police said the gunman fired into the Copper Top bar and surveillance video from outside the bar showed a man carrying a gun as he walks through a parking lot, CNN reported.
While police did not comment about the number of patrons in the bar when the shooting occurred, University of Alabama senior Riley Dunn, who was injured in the shooting, told the Tuscaloosa News he estimated there were between 80 and 90 people.
"We were all just shooting pool and hanging out," said Dunn, who suffered a leg wound. "It was kind of loud from the music, but we heard the gun shot and no one really knew what to think. The first gunshot took place, then about 20 seconds later then that's when he really started firing them off. After that everyone really scattered."
Tuscaloosa, home to the University of Alabama, is about 60 miles southwest of Birmingham.