Police have released CCTV vision of a man who may be able to assist with investigations into two robberies at Heathwood and Forestdale on the weekend.

Initial investigations indicate on Saturday December 3 just before 4am two males have entered a service station at Stapylton Road, Heathwood (vision below).

They produced knives and threatened the 19-year-old employee demanding cash.

The pair stole cash and fled the scene in a stolen grey Honda CR-V, registration 053TME (similar to that pictured).

Earlier at around 3.45am the same two males entered a service station on Johnson Road, Forestdale.

Both have produced knives and threatened the 25-year-old staff member demanding cash and cigarettes.

The pair fled empty handed when they were unable to gain access to the console area.

Neither employee was physically injured during the incidents.