Police say they are yet to determine the exact target of a drive-by shooting in Sydney's south-west, the eighth shooting since last Monday. Officers responded to reports of a shooting on Pelman Avenue in Greenacre about 4.20am today. A search of the area found six spent cartridges on the street but no damage to property. Acting Deputy Commissioner Alan Clarke says it is too early to say whether the incident is linked to recent shootings. "As we've been unable to establish a victim at this point in time, we'll go on the ballistic evidence before us and continue to conduct a canvas in that area and see if we can get to the bottom of this shooting," he said. He says the recent shootings seem to be targeting criminal networks. "Our biggest concern is the threat and the risk there is to innocent members of the public," he said. "As we've indicated continuously, this appears to be an intimidation tactic between criminal networks, and our fear is it is indicative of guns on the street. "We certainly wouldn't want an innocent member of the public to be caught up in one of these situations." Hannin Adra, who lives nearby, says she is worried. "I've got six grandkids - do you like your grandkids to grow up in this atmosphere?" she said. "It is a worry - if it's not a worry, you're not human." Neighbour Mounzer Adra says he heard five shots on the usually quiet street. "I woke up about 4.15, I hear the shooting, I wake up, I say, 'oh my God, what's happening? I thought it was a firecracker," he said. "It's not good feeling unsafe in this area, where the shooting is; something should be done about it." There have now been eight shootings in Sydney's west and south-west since last Monday night, and police have set up Operation Spartan to investigate the spate. There were two shootings in Yennora and Lakemba on Thursday night and one at Yagoona on Friday morning; no-one was injured in either of those incidents. Premier Barry O'Farrell has said he will consider new laws to compel people to speak to police about the shootings, but dismissed a call from the Opposition to recall Parliament to pass new anti-bikie legislation.