32-year-old, who was hit by several bullets, is said to be in a stable condition in hospital.Gangs Squad Commander Superintendent Mal Lanyon said he believed the gunman was a rival biker. "I think it's probably realistic that we will be looking at other motorcycle gangs," he said.Police have suggested the shooting may have been a bid to silence a potential witness to the airport fight. The violence broke out between Hells Angels and rival Comanchero gang when they got off a flight from Melbourne.Anthony Zervas, 29, was bludgeoned to death with metal poles during the incident.Five men connected to the Comancheros have been charged.The incident comes as Australian police have launched a crackdown on rising violence Among biker gangs.The New South Wales state government is considering new laws which would see some motorcycle groups banned. State Premier Nathan Rees said the move is a notice to bikers "that your days are up. It's finished".Hells Angel who witnes...