Cigarette, oily rags spark SA shed fire

A discarded cigarette and oily rags are believed to have sparked a blaze that destroyed a series of sheds and cars in Adelaide.

Two sheds with three cars went up in flames on a Christie Downs property in Adelaide's southern suburbs on Wednesday night, fire crews say.

A man who was home at the time wasn't injured and the blaze is believed to have caused about $50,000 in damage.