Police have responded to the armed robbery of a convenience store in Salisbury overnight.

At around 7:45 pm four people dressed in dark clothing, gloves and masks, entered the Lillian Avenue store armed with knives.

Two of the group jumped the counter while the other pair rain to the service area.

One of the group then assaulted a 17-year-old male staff member and demanded money and cigarettes.

The four fled the scene with a quantity of cash and cigarettes, driving away in a red hatch back.

Police are appealing for anyone who may have witnessed the incident or have dashcam footage if they were driving in the area at the time to come forward.