AN organised crime figure was stalked for hours before being executed in the front yard of his home today in the second gang shooting Sydney has witnessed this week.

Police are seeking anyone who may have information about several men who may have been sitting in cars or walking in the area including one in a black hooded tracksuit who was seen walking around the property at Thorpe Place in Abbotsbury before the attack at about 10:05am today.

media_camera Policeman are seeking information about a man in a hoodie. Picture: Supplied



"This is just a wicked attack," superintendent Peter Lennon said. "This is a residential area, this is school holidays...for this to occur is just outrageous, despicable and wicked."



Sources have identified the man as Ali Jammas, aged in his 40s.

This is the second assassination this week in Sydney.

media_camera Tyrone Slemnik was the victim of an overnight drive-by shooting.

On Monday, bikie, Tyrone Slemnik, a father of three due to be sentenced in court over extortion from a brothel owner, was shot dead outside his home in a drive-by in Eastlakes.

Supt Lennon said Mr Jammas was shot several times in the body and attempted to flee back into the house before collapsing.



"We believe that this is a targeted attack," he said "There's no one running around randomly doing this sort of stuff."



"There may have been people who were sitting in cars or around that area (on) Thorpe place, Hackett road and Cowpasture road.



"We are making a major appeal to members of the public who may have been in the area and seen something."





media_camera Heavy police attendance and dog squad follow reports of a shooting in Abbotsbury.

Mr Jammas, whose brother Harry is known to police as being associated with the Hells Angels, was treated by paramedics who conducted CPR at the scene in an attempt to save his life but he died at the scene.



Residents in the area reported hearing "a couple of shots" before the noise of a car speeding away.



Shortly after the shooting a woman, believed to be the Mr Jammas' wife, arrived at the police line accompanied by a friend.

media_camera Heavy police attendance and dog squad follow reports of a shooting in Abbotsbury.

"That's her husband," the friend called out. "You've got to let her in it's her husband."



Officers said something to the woman who collapsed to the ground sobbing before being led into the area by police.



A large number of friends appear to be on the scene with several young men and women openly weeping on the road near the home.





media_camera Distraught relatives speak to police.















The death is the second fatal shooting in less than a week and police have implored anyone with information to come forwards.



"This is 2013, this sort of behaviour is not acceptable in our society," Supt Lennon said. "People know what's going on but they won't come forward."



Police have established a crime scene and specialist forensic officers are working to establish the circumstances surrounding the shooting.



Detectives from Fairfield Local Area Command and the State Crime Command’s Homicide Squad are conducting investigations into the shooting.