Police are appealing for public assistance following an armed robbery at a service station in South Nowra overnight.

About 2.50am (Wednesday 8 August 2013), a man entered the store on the Princes Highway armed with a type of axe.

He threatened the 27-year-old male employee and demanded cash.  The employee complied and the man ran from the store towards a nearby car park.  A motorcycle was heard leaving the area a short time later.

A crime scene has been established and police investigations into the armed robbery are continuing.

The man is described as 175cm tall with a medium build wearing dark green jumper, dark long pants and sneakers.  He had his head covered with a white shirt during the incident.