Driver arrested after fleeing crash in SA

A member of the public has helped police track down a driver who fled the scene of a crash in South Australia.

Emergency workers were called to Aldinga Beach south of Adelaide about 7.15am on Saturday after the stolen sedan crashed and rolled on Main South Rd, bringing down powerlines.

Witnesses told officers a man extracted himself from the car and fled, sparking a search involving a police dog and helicopter.

A 27-year-old man was arrested shortly after noon at nearby Pages Flat Rd at Sellicks Hill, after he was spotted by a member of the public.

Police believe a rifle and ammunition found buried at a property near the crash site are linked to the man, who has no fixed address.

He is expected to be charged with illegal use/theft of a motor vehicle and displaying unassigned plates.

Police say the man is expected to be refused bail to appear at Christies Beach Magistrates Court on Monday.