A wave of violence was allegedly connected to a family feud between the Tiba, Haddara and Chaouk families several years ago.

Armed crime detectives are still investigating the motive behind Tuesday night's shooting. The gunman and up to three associates are still at large.

Up to four men in a white or cream car drove up to the victim in the Campbellfield Plaza car park about 9.30pm on Tuesday before one got out and started firing, Detective Inspector Steve Clark said.

A shopping centre security guard heard gun shots, ran outside and found the man lying on the ground with at least three gunshot wounds, Channel Nine reported.

"He heard some shooting, he ran down to see what it was, and he saw a man on the ground, bleeding," the security guard's colleague, Thomas Yoannis, said.