Police said Strike Force Flodine had been investigating “contract criminals” and their network of “kill cars” around Sydney.

Yesterday, police carried out a number of search warrants targeting a group of alleged G7 members who were believed to be using stolen cars to carry out contracts for organised crime networks.

“The G7 crew is one of several groups of contract criminals allegedly using these cars,” police said in a release.

From 6am, police executed eight search warrants in Sydney’s south-west.

In Oran Park, police arrested two men, aged 18 and 21.

They were charged with multiple offences, including participating in a criminal group.

They were refused bail and will appear in court today.

Police also arrested a 16-year-old boy in Hinchinbrook.

He was charged with multiple offences including driving a stolen car and participating in a criminal group.

He was also refused bail and will appear in a children’s court today.

In the raids, police also seized five cars, a gun, ammunition, $41,000 in cash, GPS trackers, and 37 mobile phones and encrypted devices.