Teen confronts man with gun-shaped lighter

A 14-year-old boy has been accused of threatening a truck driver with a gun-shaped cigarette lighter in Sydney's southwest.

The boy was a passenger in a BMW being driven by a 15-year-old boy, when he threatened the truck driver during a road rage incident in Bass Hill on Tuesday night, police say.

The 14-year-old will appear in a children's court next month charged with intimidation and common assault, while the 15-year-old was cautioned for driving without a licence.