Truckie attacked by toothless robber

A truck driver has been attacked by a toothless knife-wielding robber in Adelaide.

The victim was in the parked truck at Gepps Cross when a man leaned inside and stole his wallet, GPS and mobile phone from the dashboard, before punching him and threatening him with a knife.

Police say the robber, whose teeth were missing, may be linked to a nearby incident when a man threw a pole at a parked car.