Investigators believe one of the victims, a 17-year-old boy, was the gunman's target because of a dispute on Mardi Gras, Feb. 16. He was expected to be kept overnight at the hospital.
The others wounded ranged in age from 15 to 50, and were to be treated and released.
Detectives say the gunman was given a handgun by another man and then opened fire. No arrests had been made by early Sunday.