WHOEVER shot the son of Mark Sandery broke "the paramount rule" of outlaw bikies, sources close to the gangs have warned.

 Two men broke into this Semaphore house, smashed windows and shot the son of Finks club member Mark Sandery. Source: Sunday Mail (SA) 

 A Finks member, right, who was at this Semaphore house where the son, 11, of notorious Fink Mark Sandery was shot on Friday night. Picture: Digitally enhanced imageSource: AdelaideNow 

The Advertiser  has been told the shooting of the boy, 11, goes against the core values of bikies.

"When it comes to dealing with rivals, there are no hard and fast rules except for two," a source said yesterday.

"You try not to do it in public, and the paramount rule is that you never, ever hurt the wife or the kids.

"To a lot of the guys, their children mean everything ... that's why you just don't do it."

Sandery was a member of the Finks Outlaw Motorcycle Club, but there are conflicting reports on whether he remains a member.

His son was injured when two male intruders burst into a home on Military Rd, Semaphore, on Friday night.